Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{CMH_1980__55_139842, author = {Felice Ronga}, title = {Om multiple points of smooth immersions.}, journal = {Commentarii mathematici Helvetici}, pages = {521--527}, publisher = {mathdoc}, volume = {55}, year = {1980}, zbl = {0457.57013}, url = {http://geodesic.mathdoc.fr/item/CMH_1980__55_139842/} }
Felice Ronga. Om multiple points of smooth immersions.. Commentarii mathematici Helvetici, Tome 55 (1980), pp. 521-527. http://geodesic.mathdoc.fr/item/CMH_1980__55_139842/