**Selected papers:**

**-- **
*A note on tame/compatible almost complex structures on four-dimensional Lie
algebras, *joint with A. Cubas,
arXiv:1503.05963

**-- ***A note on exact forms on almost complex manifolds, *joint
with W. Zhang**,** *Math. Research Letters***, **
Volume 19 (2012), Number 3, p. 691-697,** **
arXiv:1111.7287

**--
**On the
J-anti-invariant cohomology of almost complex -4-manifolds, joint
with T.J. Li and W. Zhang, *Quarterly J. Math, Oxford* 64 (2013),
no. 1, 83-111, arXiv:1104.2511

**-- **Symplectic forms and
cohomology decomposition of almost complex 4-manifolds, joint
with T.J. Li and W. Zhang,

International
Mathematical Research Notices, Vol. 2010, No.1, pp. 1–17. [pdf file]**
**

**--** The
odd-dimensional Goldberg conjecture, joint with V.
Apostolov and A. Moroianu,*
Math. Nachr.* 279 (2006), no. 9-10,
948--952 [pdf file]

-- Symplectic
obstructions to the existence of $\omega$-compatible Einstein metrics,

*Differential Geom. Appl.* 22 (2005), no. 2,
147--158 [pdf file]

Fields Inst. Commun., 35,

-- *Local models and integrability of certain almost K\"ahler
4-manifolds*,

joint with V. Apostolov and J. Armstrong, Math. Annalen 323 (2002),
633-666 [pdf file].

-- *A splitting theorem for K\"ahler manifolds whose Ricci
tensors
have constant eigenvalues*,

joint with V. Apostolov and A. Moroianu, Int. J. Math. 12 (2001),
769--789 [pdf file].

-- *Local rigidity of certain classes of almost K\"ahler
4-manifolds*,

joint with V. Apostolov and J. Armstrong, Ann. Glob. Anal. Geom. 21
(2002), 151-176 [pdf file].

-- *Hermitian conformal classes and almost K\"ahler structures on
4-manifolds,*

joint with V. Apostolov, Diff. Geom. Appl. 11 (1999), 179-195 [pdf
file].

-- *The K\"ahler cone versus the symplectic cone*,

Bull. Math. Soc. Sc. Math. Roumanie, Tome 42 (90) No.1, 1999 [ps
file].