@article{10_21136_CPM_1971_117738,
     author = {Obo\v{n}a, Jozef and Podtjagin, Nikolaj},
     title = {O niektor\'ych \v{d}al\v{s}ich vlastnostiach kriviek triedy $P$},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {398--405},
     year = {1971},
     volume = {96},
     number = {4},
     doi = {10.21136/CPM.1971.117738},
     mrnumber = {0305248},
     zbl = {0223.50013},
     language = {sk},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1971.117738/}
}