@article{MM2_1975__15_154325,
     author = {Georg Stamov},
     title = {Strahlensysteme mit gemeinsamem sph\"arischen  {Bild.}},
     journal = {Manuscripta mathematica},
     pages = {329--340},
     publisher = {mathdoc},
     volume = {15},
     year = {1975},
     zbl = {0319.53012},
     url = {http://geodesic.mathdoc.fr/item/MM2_1975__15_154325/}
}