@article{10_21136_CPM_1973_117813,
     author = {Netuka, Ivan},
     title = {Pozn\'amka o semiregul\'arn{\'\i}ch mno\v{z}in\'ach},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {419--421},
     publisher = {mathdoc},
     volume = {098},
     number = {4},
     year = {1973},
     doi = {10.21136/CPM.1973.117813},
     mrnumber = {0340632},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1973.117813/}
}