@article{GDZPPN002281740, title = {\"Uber vierdimensionale Drehungen.}, journal = {Mathematische Annalen}, volume = {121}, year = {1949}, pages = {22-32}, language = {de}, url = {http://dml.mathdoc.fr/item/GDZPPN002281740} }
Hesselbach, Benno. Über vierdimensionale Drehungen.. Mathematische Annalen, Tome 121 (1949) pp. 22-32. http://gdmltest.u-ga.fr/item/GDZPPN002281740/