@article{10_21136_CMJ_1975_101336,
     author = {Wintgen, Peter},
     title = {Homotopien von {Untermannigfaltigkeiten} mit nicht ausgearteter zweiter {Fundamentalform}},
     journal = {Czechoslovak Mathematical Journal},
     pages = {424--437},
     publisher = {mathdoc},
     volume = {25},
     number = {3},
     year = {1975},
     doi = {10.21136/CMJ.1975.101336},
     mrnumber = {0388442},
     zbl = {0323.53023},
     language = {ge},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1975.101336/}
}