@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/}
}