1. M. Erve, Functions of Many Complex Variables [in Russian], Moscow, "Mir" (1965).
2. Séminaire H. Cartan, Paris, No. 18 (1960/1961).
3. G. Grauert, Complex Spaces [in Russian], Moscow, "Mir" (1965).
4. V. P. Palamodov, "On the multiplicity of holomorphic mappings," Funkts. Analiz,1, No. 3, 54?65 (1967)