Solution of an extremal problem for classes of discontinuous functions of two variables in permutations
English version (Springer): Ukrainian Mathematical Journal 31 (1979), no. 1, pp 75-80.
Citation Example: Stepanets O. I. Solution of an extremal problem for classes of discontinuous functions of two variables in permutations // Ukr. Mat. Zh. - 1979. - 31, № 1. - pp. 95–101.
Full text