@article{JRAM_1967__226_150789,
     author = {Bl. Dolaptschiew},
     title = {?ber die },
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {103--107},
     publisher = {mathdoc},
     volume = {226},
     year = {1967},
     zbl = {0148.44002},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1967__226_150789/}
}