@article{CMUC_1996_37_3_a9,
     author = {Michor, Peter W. and Van\v{z}ura, Ji\v{r}{\'\i}},
     title = {Characterizing algebras of $C^\infty$-functions on manifolds},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {519--521},
     year = {1996},
     volume = {37},
     number = {3},
     mrnumber = {1426917},
     zbl = {0881.58001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1996_37_3_a9/}
}