@article{GDZPPN002290510, title = {Homomorphiebasen von Graphenmengen.}, journal = {Mathematische Annalen}, volume = {146}, year = {1962}, pages = {126-142}, language = {de}, url = {http://dml.mathdoc.fr/item/GDZPPN002290510} }
Wagner, K.; HALIN, R. Homomorphiebasen von Graphenmengen.. Mathematische Annalen, Tome 146 (1962) pp. 126-142. http://gdmltest.u-ga.fr/item/GDZPPN002290510/