@article{MAN_1976__221_162835,
     author = {Horst Bergmann},
     title = {\"Uber endliche {Graphen} mit vorgegebenen {Homomorphieeigenschaften.}},
     journal = {Mathematische Annalen},
     pages = {81--94},
     year = {1976},
     volume = {221},
     zbl = {0308.05132},
     url = {http://geodesic.mathdoc.fr/item/MAN_1976__221_162835/}
}