@article{10_21136_CMJ_1965_100661,
     author = {Hor\'ak, Vladim{\'\i}r},
     title = {Contribution \`a la d\'eformation projective des congruences de droites},
     journal = {Czechoslovak Mathematical Journal},
     pages = {179--204},
     publisher = {mathdoc},
     volume = {15},
     number = {2},
     year = {1965},
     doi = {10.21136/CMJ.1965.100661},
     mrnumber = {0179707},
     zbl = {0139.38603},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1965.100661/}
}