Khomenko N P

Publications in Math-Net.Ru

1. Planarity of coverings of graphs
   
   Diskr. Mat., 3:2 (1991),  103–113
2. The method of $\varphi $-transformations and some of its applications in graph theory
   
   Trudy Mat. Inst. Steklov., 154 (1983),  275–283