@article{BAG_1976__5_138128,
     author = {J. B\"OHM},
     title = {\"Uber die {Struktur} orthogonal-entarteter elliptischer {Orthoscheme}},
     journal = {Beitr\"age zur Algebra und Geometrie},
     pages = {41--56},
     publisher = {mathdoc},
     volume = {5},
     year = {1976},
     url = {http://geodesic.mathdoc.fr/item/BAG_1976__5_138128/}
}