%0 Journal Article %A Anton O. Belyakov %T On necessary optimality conditions for Ramsey-type problems %J Ural mathematical journal %D 2019 %P 24-30 %V 5 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/UMJ_2019_5_1_a2/ %G en %F UMJ_2019_5_1_a2