Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{ELMA_1978__33_141213, author = {Egon Joachim}, title = {Minimale nicht in die {Ringfl\"ache} einbettbare {Graphen.}}, journal = {Elemente der Mathematik}, pages = {57--61}, publisher = {mathdoc}, volume = {33}, year = {1978}, zbl = {0387.05006}, url = {http://geodesic.mathdoc.fr/item/ELMA_1978__33_141213/} }
Egon Joachim. Minimale nicht in die Ringfläche einbettbare Graphen.. Elemente der Mathematik, Tome 33 (1978), pp. 57-61. http://geodesic.mathdoc.fr/item/ELMA_1978__33_141213/