@article{GDZPPN002188090,
title = {Congruent Embedding of Metric Quadruples on a Unit Sphere.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {258},
year = {1973},
pages = {205-209},
zbl = {0261.52013},
url = {http://dml.mathdoc.fr/item/GDZPPN002188090}
}
Loveland, L.D.; Valentine, J.E. Congruent Embedding of Metric Quadruples on a Unit Sphere.. Journal für die reine und angewandte Mathematik, Tome 258 (1973) pp. 205-209. http://gdmltest.u-ga.fr/item/GDZPPN002188090/