@article{MZ_1975__144_172254,
     author = {Christian Herrmann and Andr\'as P. Huhn},
     title = {Zum {Begriff} der {Charakteristik} modularer {Verb\"ande.}},
     journal = {Mathematische Zeitschrift},
     pages = {185--194},
     publisher = {mathdoc},
     volume = {144},
     year = {1975},
     zbl = {0316.06006},
     url = {http://geodesic.mathdoc.fr/item/MZ_1975__144_172254/}
}