@article{GDZPPN002036304,
title = {Angle-preserving transformations of spheres.},
journal = {Aequationes mathematicae},
volume = {33},
year = {1987},
pages = {52-57},
zbl = {0617.51020},
url = {http://dml.mathdoc.fr/item/GDZPPN002036304}
}
Lester, J.A. Angle-preserving transformations of spheres.. Aequationes mathematicae, Tome 33 (1987) pp. 52-57. http://gdmltest.u-ga.fr/item/GDZPPN002036304/