@article{10_21136_CMJ_1971_101017,
     author = {Krejzl{\'\i}k, Jaroslav},
     title = {Deformations of plane pseudocongruences with projective connection},
     journal = {Czechoslovak Mathematical Journal},
     pages = {213--233},
     publisher = {mathdoc},
     volume = {21},
     number = {2},
     year = {1971},
     doi = {10.21136/CMJ.1971.101017},
     mrnumber = {0308955},
     zbl = {0221.53026},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1971.101017/}
}