@article{AM2_1979__19_136835,
     author = {Ulrich Faigle},
     title = {\"Uber {Morphismen} halbmodularer {Verb\"ande} {(Short} {Communication).}},
     journal = {Aequationes mathematicae},
     pages = {306--307},
     publisher = {mathdoc},
     volume = {19},
     year = {1979},
     url = {http://geodesic.mathdoc.fr/item/AM2_1979__19_136835/}
}