@article{BAG_1971__1_138074,
     author = {M. Stern and A. KERT\'ESZ},
     title = {A-Verb\"ande {I}},
     journal = {Beitr\"age zur Algebra und Geometrie},
     pages = {121--134},
     publisher = {mathdoc},
     volume = {1},
     year = {1971},
     url = {http://geodesic.mathdoc.fr/item/BAG_1971__1_138074/}
}