Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MM2_1976__18_154379, author = {Georg Stamou}, title = {\"Uber die isotropen {Strahlensysteme.}}, journal = {Manuscripta mathematica}, pages = {15--24}, publisher = {mathdoc}, volume = {18}, year = {1976}, zbl = {0325.53010}, url = {http://geodesic.mathdoc.fr/item/MM2_1976__18_154379/} }
Georg Stamou. Über die isotropen Strahlensysteme.. Manuscripta mathematica, Tome 18 (1976), pp. 15-24. http://geodesic.mathdoc.fr/item/MM2_1976__18_154379/