Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{CMH_1940__13_138758, author = {K. Merz}, title = {Heptaeder aus verschiedenen {Netzen.}}, journal = {Commentarii mathematici Helvetici}, pages = {49--53}, publisher = {mathdoc}, volume = {13}, year = {1940}, zbl = {0024.06802}, url = {http://geodesic.mathdoc.fr/item/CMH_1940__13_138758/} }
K. Merz. Heptaeder aus verschiedenen Netzen.. Commentarii mathematici Helvetici, Tome 13 (1940), pp. 49-53. http://geodesic.mathdoc.fr/item/CMH_1940__13_138758/