@article{CMUC_1974__15_1_a4,
     author = {Slav{\'\i}k, V\'aclav},
     title = {Some primitive classes of lattices closed under the formation of projective images},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {65--68},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {1974},
     mrnumber = {0340125},
     zbl = {0289.06009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1974__15_1_a4/}
}