Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{CMH_1961__35_139210, author = {Nicolaas H. Kuiper}, title = {Convex {Immersions} of {Closed} {Surfaces} in {E3.}}, journal = {Commentarii mathematici Helvetici}, pages = {85--92}, publisher = {mathdoc}, volume = {35}, year = {1961}, zbl = {0243.53043}, url = {http://geodesic.mathdoc.fr/item/CMH_1961__35_139210/} }
Nicolaas H. Kuiper. Convex Immersions of Closed Surfaces in E3.. Commentarii mathematici Helvetici, Tome 35 (1961), pp. 85-92. http://geodesic.mathdoc.fr/item/CMH_1961__35_139210/