Exotic Stein fillings with arbitrary fundamental group,
with B. Ozbagci, this article is in preprint form, and contains the following results: (i) for any finitely presentable group G, the existence of an isolated complex surface singularity link which admits infinitely many exotic Stein fillings with the fundamental group isomorphic to G; (ii) construction of an infinite family of exotic non-holomorphic Lefschetz fibrations over the two-sphere with the fundamental group G.

Reducible smooth structures on 4-manifolds with zero signature,
with M. Ishida, and D. Park, Journal of Topology, 7 (2014), no. 3, 607-616.

Symplectic Calabi-Yau 6-Manifolds, Advances in Mathematics, 262 (2014), 115-125.

Geography of Simply Connected Spin Symplectic 4-Manifolds , with B. D. Park,
Math. Res. Letters, 17 (2010), no. 3, 483-492.