Matchings and cycle covers in random digraphs. Some extremal results in cochromatic and dichromatic theory. Chromatic number versus cochromatic number in graphs with bounded clique number. European J. Combin. Probabilistic analysis of subgraphs with minimum degree exceeding half their order.
Abelian group labels on graphs.
05C25 End vertices in interval graphs. Some topics in cochromatic theory. Three extremal problems in cochromatic theory. Homogeneously representable interval graphs. Switching sequences of graphs and chromatic numbers.