@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},
     year = {1965},
     volume = {6},
     number = {4},
     mrnumber = {0196586},
     zbl = {0136.42102},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1965_6_4_a6/}
}