@article{10_21136_CPM_1967_108139,
     author = {Obo\v{n}a, Jozef},
     title = {\v{Z}ivotn\'e jubileum doc. {RNDr.} {Nikolaja} {Podtjagina}},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {239--240},
     publisher = {mathdoc},
     volume = {092},
     number = {2},
     year = {1967},
     doi = {10.21136/CPM.1967.108139},
     zbl = {0155.33506},
     language = {sk},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1967.108139/}
}