@article{MASLO_1959_9_3_a4,
     author = {Hrmov\'a, Ren\'ata},
     title = {O  ekvivalencii ist\'ych pravidiel  kr\'atenia v pologrup\'ach},
     journal = {Mathematica slovaca},
     pages = {177--182},
     year = {1959},
     volume = {9},
     number = {3},
     mrnumber = {0131478},
     zbl = {0132.01002},
     language = {sk},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1959_9_3_a4/}
}