1. Adam, A.: Problem 2–10. J. Comb. Theory (A)2, 393 (1967)
2. Adam, A.: On some open problems of applied automation theory (suggested by the mathematical modelling of certain neuronal networks). Acta Cybern3, 187–214 (1977)
3. Adel'son-Velskii, G.M., Weisfeiler, B. Ju., Leman, A.A., Faradžev I.A.: Example of a graph without a transitive automorphism group. Sov. Math. Dokl.10, 440–441 (1969)
4. Aigner, M.: Combinatorial Theory. Springer, Berlin, Heidelberg, New York 1979
5. Algorithmic Investigations in Combinatorics. Nauka, Moscow 1978 (in Russian)