1. The existence of unavoidable sets of geographically good configurations;Appel;Illinois J Math,1976
2. Optimal vertex partition;Bollobás;Bull London Math Soc,1979
3. On decomposition of graphs into degenerate subgraphs (in Russian);Borodin;Metody Discret Anal,1976
4. O. V. Borodin, Criterion of chromaticity of a degree prescription (in Russian), Abstracts of IV All-Union Conference on Theoretical Cybernetics, Novosibirsk, 1977, pp.127-128.
5. O. V. Borodin, Problems of colouring and of covering the vertex set of a graph by induced subgraphs (in Russian), Ph.D. Thesis, Novosibirsk, 1979.