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@article{MAN_1962__147_160956, author = {K. Wagner and R. HALIN}, title = {Homomorphiebasen von {Graphenmengen.}}, journal = {Mathematische Annalen}, pages = {126--142}, publisher = {mathdoc}, volume = {147}, year = {1962}, language = {de}, url = {http://geodesic.mathdoc.fr/item/MAN_1962__147_160956/} }
K. Wagner; R. HALIN. Homomorphiebasen von Graphenmengen.. Mathematische Annalen, Tome 147 (1962), pp. 126-142. http://geodesic.mathdoc.fr/item/MAN_1962__147_160956/