@article{105369, author = {Pavel K\v rivka}, title = {On homomorphism perfect graphs}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {012}, year = {1971}, pages = {619-626}, zbl = {0223.05128}, mrnumber = {0291023}, language = {en}, url = {http://dml.mathdoc.fr/item/105369} }
Křivka, Pavel. On homomorphism perfect graphs. Commentationes Mathematicae Universitatis Carolinae, Tome 012 (1971) pp. 619-626. http://gdmltest.u-ga.fr/item/105369/
On rigid undirected graphs, Canad. J. Math. 18 (1966), 1237-1242. (1966) | MR 0200193
Tensor products in the category of graphs, Comment. Math. Univ. Carolinae 11 (1970), 619-639. (1970) | MR 0387373 | Zbl 0214.51102
On homomorphic images of transition graphs, J. Franklin Institute 278 (1964), 291-296. (1964) | MR 0167975 | Zbl 0192.07601
O sdvigach pologrupp I, Periodičeskije i kvaziperiodičeskije preobrazovanija, Mat. časopis SAV 3 (1968), 161-176. (1968) | MR 0238980