@article{1250126654, author = {Loveland, L.D.}, title = {Tangent ball embeddings of set in $E^3$}, journal = {Rocky Mountain J. Math.}, volume = {17}, number = {4}, year = {1987}, pages = { 141-150}, language = {en}, url = {http://dml.mathdoc.fr/item/1250126654} }
Loveland, L.D. Tangent ball embeddings of set in $E^3$. Rocky Mountain J. Math., Tome 17 (1987) no. 4, pp. 141-150. http://gdmltest.u-ga.fr/item/1250126654/