@article{AM2_1973__9_136322,
     author = {S. KUREPA},
     title = {On {Bimorphisms} and {Quadratic} {Forms} on {Groups}},
     journal = {Aequationes mathematicae},
     pages = {30--45},
     publisher = {mathdoc},
     volume = {9},
     year = {1973},
     zbl = {0256.20054},
     url = {http://geodesic.mathdoc.fr/item/AM2_1973__9_136322/}
}