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@article{MM2_1970__2_153993, author = {Hermann Karcher}, title = {Anwendungen der {Alexandrowschen} {Winkelvergleichss\"atze.}}, journal = {Manuscripta mathematica}, pages = {77--102}, publisher = {mathdoc}, volume = {2}, year = {1970}, zbl = {0185.25803}, url = {http://geodesic.mathdoc.fr/item/MM2_1970__2_153993/} }
Hermann Karcher. Anwendungen der Alexandrowschen Winkelvergleichssätze.. Manuscripta mathematica, Tome 2 (1970), pp. 77-102. http://geodesic.mathdoc.fr/item/MM2_1970__2_153993/