Protopopov A N

Publications in Math-Net.Ru

1. Topological classification of branched coverings of the two-dimensional sphere
   
   Zap. Nauchn. Sem. LOMI, 167 (1988),  135–156
2. Homeomorphisms of branched coverings of a two-dimensional sphere
   
   Dokl. Akad. Nauk SSSR, 290:4 (1986),  792–795