@article{CMUC_1965__6_4_a0,
     author = {Svoboda, Karel},
     title = {D\'eformation ponctuelle des congruences de droites dans des espaces symplectiques \`a trois dimensions},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {393--401},
     publisher = {mathdoc},
     volume = {06},
     number = {4},
     year = {1965},
     mrnumber = {0195011},
     zbl = {0132.15904},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1965__6_4_a0/}
}