1.Fornæss, J. E. and Zame, W. R., Riemann domains and envelopes of holomorphy, Duke Math. J. 50 (1983), 273–283.
2.Hammond, C., Schlicht envelopes of holomorphy and topology, Math. Z. 266 (2010), 285–288.
3.Hatcher, A., Algebraic topology (Cambridge University Press, 2002).
4.Jupiter, D., A schlichtness theorem for envelopes of holomorphy, Math. Z. 253 (2006), 623–633.
5.Kerner, H., Überlagerungen und Holomorphiehüllen, Math. Annalen 144 (1961), 126–134.
6.Munkres, J. R., Elements of algebraic topology (Addison-Wesley, 1984).
7.Rotman, J. J., An introduction to the theory of groups, 4th edn, Graduate Texts in Mathematics, Volume 148 (Springer, 1995).
8.Royden, H. L., One-dimensional cohomology in domains of holomorphy, Annals Math. 78 (1963), 197–200.
9.Stein, K., Überlagerungen holomorph-vollständiger komplexer Räume, Arch. Math. 7 (1956), 354–361.