- Engel structures and weakly hyperbolic flows on four-manifolds, (with T. Vogel),
*Comment. Math. Helv.*(to appear), Preprint arXiv:1610.04001 . - On stability of non-domination under taking products. (with C. Löh and C. Neofytidis),
*Proc. Amer. Math. Soc.***144**(2016), 2705--2710. - Presentability by products for some classes of groups. (with P. de la Harpe),
*J. Topol. Anal.***9**(2017), 27--49. - Updates on Hirzebruch's 1954 Problem List. Preprint arXiv:1305.4624 .
- Kählerian three-manifold groups.
*Math. Res. Lett.***20**(2013), 521--525. - Geometric formality and non-negative scalar curvature. Preprint arXiv:1212.3317 .
- The deficiencies of Kähler groups,
*Journal of Topology***5**(2012), 639--650. (Reprints available upon request.) - On three-manifolds dominated by circle bundles, (with C. Neofytidis),
*Math. Zeitschrift***274**(2013), 21--32. - The Hodge ring of Kähler manifolds, (with S. Schreieder),
*Compositio Math.***149**(2013), 637--657. (Reprints available upon request.) - Three-manifolds and Kähler groups,
*Ann. Inst. Fourier***62**(2012), 1081--1090. (Reprints available upon request.) - Contact pairs and locally conformally symplectic structures, (with G. Bande),
*Contemp. Math.***542**(2011), 85--98. - Entropies, volumes, and Einstein metrics, in
*Global Differential Geometry*, C. Bär et al. (eds.), pp. 39--64, Springer Proceedings in Mathematics**17**, Springer Verlag 2012. - Groups not presentable by products, (with C. Löh),
*Groups Geom. Dyn.***7**(2013), 181--204. (Reprints available upon request.) - The Gelfand-Kalinin-Fuks class and characteristic classes of transversely symplectic foliations, (with S. Morita), Preprint arXiv:0910.3414 .
- Characteristic numbers of algebraic varieties,
*Proc. Natl. Acad. Sci. USA***106**(2009), 10114--10115. (Reprints available upon request.) - Topologically invariant Chern numbers of projective varieties,
*Adv. Math.***229**(2012), 1300-1312. (Reprints available upon request.) - Pontryagin numbers and nonnegative curvature,
*J. reine angew. Math.*(Crelle's Journal)**646**(2010), 135--140. (Reprints available upon request.) - Geometric formality of homogeneous spaces and of biquotients,
(with S. Terzic),
*Pacific J. Math.***249**(2011), 157--176. - Fibrations and fundamental groups of Kähler-Weyl manifolds,
(with G. Kokarev),
*Proc. Amer. Math. Soc.***138**(2010), 997--1010. (Reprints available upon request.) - Moser stability for locally conformally symplectic structures, (with G. Bande),
*Proc. Amer. Math. Soc.***137**(2009), 2419--2424. (Reprints available upon request.) - On hyperbolic cohomology classes,
(with M. Brunnbauer), Preprint arXiv:0808.1482 .
- Fundamental classes not representable by products, (with C. Löh),
*J. London Math. Soc.***79**(2009), 545--561. (Reprints available upon request.) - Stable length in stable groups, in
*Groups of Diffeomorphisms in honor of Shigeyuki Morita on the occasion of his 60th birthday*, Advanced Studies in Pure Mathematics 52, Mathematical Society of Japan 2008, pp. 401--413. (Reprints available upon request.) - Chern numbers and the geometry of partial flag manifolds, (with S. Terzic),
*Comment. Math. Helv.***84**(2009), 587--616. (Reprints available upon request.) - Chern numbers and diffeomorphism types of projective varieties,
*Journal of Topology***1**(2008), 518--526. (Reprints available upon request.) - Coarse topology, enlargeability and essentialness, (with B. Hanke, J. Roe and T. Schick),
*Ann. Sci. Ecole Norm. Sup.***41**(2008), 471--493. - The geometry of recursion operators, (with G. Bande),
*Commun. Math. Phys.***280**(2008), 737--749. (Reprints available upon request.) - Monopole classes and Perelman's invariant of four-manifolds, Preprint arXiv:math.DG/0608504 .
- Failure of separation by quasi-homomorphisms in mapping class groups, (with H. Endo),
*Proc. Amer. Math. Soc.***135**(2007), 2747--2750. (Reprints available upon request.) - Die Klassifikation von Fussballmustern, (with V. Braungardt),
*Math. Semesterberichte***54**(2007), 53--68.

See Preprint arXiv:math.GT/0606193 for an English version. - Minimality and irreducibility of symplectic four-manifolds, (with M. Hamilton),
*Int. Math. Res. Not.*2006 (2006) Article ID 35032, 13 pages. (Reprints available upon request.) - Minimizing Euler characteristics of symplectic four-manifolds,
*Proc. Amer. Math. Soc.***134**(2006), 3081--3083. (Reprints available upon request.) - Crossed flux homomorphisms and vanishing theorems for flux groups, (with J. Kedra and S. Morita),
*Geom. Funct. Anal.***16**(2006), 1246--1273. (Reprints available upon request.) - Free circle actions with contractible orbits on symplectic manifolds,
*Math. Zeitschrift***252**(2006), 19--25. (Reprints available upon request.) - Characteristic classes of foliated surface bundles with area-preserving holonomy, (with S. Morita),
*J. Differential Geometry***75**(2007), 273--302. (Reprints available upon request.) - Stability theorems for symplectic and contact pairs, (with G. Bande and P. Ghiggini),
*Int. Math. Res. Not.***2004:68**(2004), 3673--3688. (Reprints available upon request.) - The geometry of symplectic pairs, (with G. Bande),
*Trans. Amer. Math. Soc.***358**(2006), 1643--1655. (Reprints available upon request.) - Quasi-homomorphisms and stable lengths in mapping class groups,
*Proc. Amer. Math. Soc.***132**(2004), 3167-3175. (Reprints available upon request.)

See also What is a Quasi-morphism?*Notices Amer. Math. Soc.***51**no. 2 (2004), 208--209. (Reprints available upon request.) - Signatures of foliated surface bundles and the symplectomorphism groups of surfaces,
(with S. Morita),
*Topology***44**(2005), 131--149. - Monopole classes and Einstein metrics.
(With an Appendix on ``Ricci-flat four-manifolds'' by D. Kotschick and J. Wehrheim.)
*Int. Math. Res. Not.***2004:12**(2004), 593--609. (Reprints available upon request.) - Einstein metrics and the number of smooth structures on a four-manifold,
(with V. Braungardt),
*Topology***44**(2005), 641--659. (Reprints available upon request.) - Dissolving four-manifolds and positive scalar curvature, (with B. Hanke and J. Wehrheim),
*Math. Zeitschrift***245**(2003), 545--555. (Reprints available upon request.) - Clustering of critical points in Lefschetz fibrations and the symplectic Szpiro inequality, (with V. Braungardt),
*Trans. Amer. Math. Soc.***355**(2003), 3217--3226. (Reprints available upon request.) -
Linking numbers of measured foliations, (with T. Vogel),
*Ergodic Theory Dynam. Systems***23**(2003), 541--558. (Reprints available upon request.) - Godbillon-Vey invariants for families of foliations, in ``Symplectic and Contact Topology: Interactions and Perspectives'', Fields Institute Communications, American Mathematical Society 2003. (Reprints available upon request.)
- On formality of generalized symmetric spaces, (with S. Terzic),
*Math. Proc. Cambridge Phil. Soc.***134**(2003), 491--505. (Reprints available upon request.) - Cycles, submanifolds, and structures on normal bundles, (with C. Bohr and B. Hanke).
*Manuscripta Math.***108**(2002), 483--494. (Reprints available upon request.) - Commutators, Lefschetz fibrations and the signatures of surface bundles, (with H. Endo, M. Korkmaz, B. Ozbagci and A. Stipsicz).
*Topology***41**(2002), 961--977. - Bounded cohomology and non-uniform perfection of mapping class groups, (with H. Endo).
*Invent. math.***144**(2001), 169--175. (Reprints available upon request.) - On products of harmonic forms,
*Duke Math. Journal***107**(2001), 521--531. (Reprints available upon request.) - An integrability theorem for almost Kähler 4-manifolds, (with V. Apostolov and T. Draghici),
*C. R. Acad. Sci. Paris***329**(1999), 413--418. - On the simplicial volumes of fiber bundles, (with M. Hoster),
*Proc. Amer. Math. Soc.***129**(2001), 1229--1232. (Reprints available upon request.) - On regularly fibered complex surfaces,
*Geometry and Topology Monographs*, Volume 2: Proceedings of the Kirbyfest, ISSN 1464-8997 - Signatures, monopoles and mapping class groups,
*Math. Research Letters***5**(1998), 227--234. (Reprints available upon request.) - On the Gromov-Hitchin-Thorpe inequality,
*C. R. Acad. Sci. Paris***326**(1998), 727--731. (Reprints available upon request.) - Einstein metrics and smooth structures,
*Geometry and Topology***2**(1998), 1--10. - The Seiberg-Witten invariants of symplectic four-manifolds, Séminaire Bourbaki, Exp. No. 812,
*Astérisque***241**(1997), 195--220. (Reprints available upon request.) - Orientations and geometrisations of compact complex surfaces,
*Bull. London Math. Soc.***29**(1997), 145--149. (Reprints available upon request.) - On irreducible four-manifolds, Preprint alg-geom 9504012, (unpublished).
- Four-manifolds without symplectic structures but with nontrivial Seiberg-Witten invariants, (with J. W. Morgan and C. H. Taubes),
*Math. Research Letters***2**(1995), 119--124. (Sorry, no reprints available.) - Non-trivial harmonic spinors on generic algebraic surfaces,
*Proc. Amer. Math. Soc.***124**(1996), 2315--2318. (Reprints available upon request.) - Gauge Theory Is Dead!--Long Live Gauge Theory!,
*Notices Amer. Math. Soc.***42**(1995), 335--338.

- My review of ``Embedded surfaces and the structure of Donaldson's polynomial invariants'' by P. B. Kronheimer and T. S. Mrowka,
*Math. Reviews,*96e:57019.

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