@article{AM2_1987__32_137176,
     author = {J.A. Lester},
     title = {Angle-preserving transformations of spheres.},
     journal = {Aequationes mathematicae},
     pages = {52--57},
     publisher = {mathdoc},
     volume = {32},
     year = {1987},
     zbl = {0617.51020},
     url = {http://geodesic.mathdoc.fr/item/AM2_1987__32_137176/}
}