1. Complex Algebraic Surfaces, vol. 34;Beauville,1996
2. Compact Complex Surfaces;Barth,2004
3. A note concerning Fox's paper on Fenchel's conjecture;Chau;Proc. Am. Math. Soc.,1983
4. Sur les groupes d'Eilenberg-MacLane. II;Cartan;Proc. Natl. Acad. Sci.,1954
5. Class VII0 surfaces with b2 curves;Dloussky;Tohoku Math. J. (2),2003