@article{GDZPPN002219433,
title = {\"Uber die isotropen Strahlensysteme.},
journal = {Manuscripta mathematica},
volume = {18},
year = {1976},
pages = {15-24},
zbl = {0325.53010},
url = {http://dml.mathdoc.fr/item/GDZPPN002219433}
}
Stamou, Georg. Über die isotropen Strahlensysteme.. Manuscripta mathematica, Tome 18 (1976) pp. 15-24. http://gdmltest.u-ga.fr/item/GDZPPN002219433/