Dimension of the sum of several copies of a graph Pavel Křivka — 1985 Czechoslovak Mathematical Journal
On homomorphism perfect graphs Pavel Křivka — 1971 Commentationes Mathematicae Universitatis Carolinae
On representations of monoids as monoids of polynomials Pavel Křivka — 1972 Commentationes Mathematicae Universitatis Carolinae
On the distance polynomial of a graph Pavel Křivka; Nenad Trinajstić — 1983 Aplikace matematiky Several properties of the distance polynomial are discussed.