@article{GDZPPN002432366,
title = {A New Formula for the Shape Operator of a Geodesic Sphere and Its Applications.},
journal = {Mathematische Zeitschrift},
volume = {192},
year = {1986},
pages = {613-626},
zbl = {0596.53017},
url = {http://dml.mathdoc.fr/item/GDZPPN002432366}
}
Kowalski, O.; Vanhecke, L. A New Formula for the Shape Operator of a Geodesic Sphere and Its Applications.. Mathematische Zeitschrift, Tome 192 (1986) pp. 613-626. http://gdmltest.u-ga.fr/item/GDZPPN002432366/