@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/}
}