Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{CMUC_1965__6_4_a6, author = {Havel, V\'aclav}, title = {Freie {Erweiterungen} von {Schemen} $n$-ten {Grades}}, journal = {Commentationes Mathematicae Universitatis Carolinae}, pages = {443--448}, publisher = {mathdoc}, volume = {06}, number = {4}, year = {1965}, mrnumber = {0196586}, zbl = {0136.42102}, language = {ge}, url = {http://geodesic.mathdoc.fr/item/CMUC_1965__6_4_a6/} }
Havel, Václav. Freie Erweiterungen von Schemen $n$-ten Grades. Commentationes Mathematicae Universitatis Carolinae, Tome 06 (1965) no. 4, pp. 443-448. http://geodesic.mathdoc.fr/item/CMUC_1965__6_4_a6/