@misc{PMFA_1959_4_4_a2,
     title = {O pr\'aci {P.} {S.} {Novikova} {"O} algoritmick\'e ne\v{r}e\v{s}itelnosti probl\'emu toto\v{z}nosti slov v teorii grup"},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {421--422},
     year = {1959},
     volume = {4},
     number = {4},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1959_4_4_a2/}
}