@article{GDZPPN002302462, title = {Intersections of Tangent Cones.}, journal = {Mathematische Annalen}, volume = {189}, year = {1970}, pages = {211-216}, zbl = {0181.09002}, url = {http://dml.mathdoc.fr/item/GDZPPN002302462} }
KENDIG, K. Intersections of Tangent Cones.. Mathematische Annalen, Tome 189 (1970) pp. 211-216. http://gdmltest.u-ga.fr/item/GDZPPN002302462/