@article{PMFA_1975__20_4_a3,
     author = {Medek, V\'aclav},
     title = {Ov\'aly v projekt{\'\i}vnych rovin\'ach},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {204--211},
     publisher = {mathdoc},
     volume = {20},
     number = {4},
     year = {1975},
     mrnumber = {0500505},
     language = {sl},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1975__20_4_a3/}
}