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@article{JRAM_1981__325_152356, author = {L. Vanhecke and B.-Y. Chen}, title = {Differential geometry of geodesic spheres.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {28--67}, publisher = {mathdoc}, volume = {325}, year = {1981}, zbl = {0503.53013}, url = {http://geodesic.mathdoc.fr/item/JRAM_1981__325_152356/} }
L. Vanhecke; B.-Y. Chen. Differential geometry of geodesic spheres.. Journal für die reine und angewandte Mathematik, Tome 325 (1981), pp. 28-67. http://geodesic.mathdoc.fr/item/JRAM_1981__325_152356/