@article{CMUC_1993__34_4_a3,
     author = {Fe\v{c}kan, Michal},
     title = {Equivalence and zero sets of certain maps in infinite dimensions},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {645--655},
     publisher = {mathdoc},
     volume = {34},
     number = {4},
     year = {1993},
     mrnumber = {1263794},
     zbl = {0807.58005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1993__34_4_a3/}
}