1. [G] M. Gromov, Pseudoholomorphic curves in symplectic manifolds, Invent. Math. 82 (1985), no. 2, 307–347.
2. [B] K. Brown, Cohomology of Groups, Grad. Texts in Math., vol. 87, Springer-Verlag, New York, 1982.
3. [CF] P. Conner and F. Floyd, Differentiable Periodic Maps, Ergeb. Math. Grenzgeb., vol. 33, Academic Press, New York, 1964.
4. [DG] I. Dolgachev and M. Gross, Elliptic threefolds I, Ogg-Shafarevich theory, J. Algebraic Geom. 3 (1994), no. 1, 39–80.
5. [DP] S. K. Donaldson and P. Kronheimer, The Geometry of Four-Manifolds, Oxford Math. Monographs, Oxford Univ. Press, New York, 1990.