@article{MZ_1942__47_168972,
     author = {K., Strubecker},
     title = {Differentialgeometrie des isotropen {Raumes.} {II.} {Die} {Fl\"achen} konstanter {Relativkr\"ummung} {K} = rt ? s2},
     journal = {Mathematische Zeitschrift},
     pages = {743--777},
     publisher = {mathdoc},
     volume = {47},
     year = {1942},
     zbl = {68.0439.01},
     url = {http://geodesic.mathdoc.fr/item/MZ_1942__47_168972/}
}