1. D. Fotiadi, M. Froissart, J. Lascoux, and F. Pham (to be published).
2. A reference for the topology used is P. J. Hilton and S. Wylie,Homology Theory(Cambridge University Press, New York, 1960).
3. R. C. Gunning, “Local Theory of Several Complex Variables,” H. Rossi, “Global Theory of Several Complex Variables.” Both are Princeton University notes.
4. N. Steenrod,The Topology of Fibre Bundles(Princeton University Press, Princeton, New Jersey, 1951).