@article{10_21136_CMJ_1971_101010,
     author = {Havl{\'\i}\v{c}ek, Karel and Tietze, J\"urgen},
     title = {Zur {Geometrie} der endlichen {Ebene} der {Ordnung} $n=4$},
     journal = {Czechoslovak Mathematical Journal},
     pages = {157--164},
     publisher = {mathdoc},
     volume = {21},
     number = {1},
     year = {1971},
     doi = {10.21136/CMJ.1971.101010},
     mrnumber = {0278167},
     zbl = {0216.43001},
     language = {ge},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1971.101010/}
}