@article{MASLO_1961_11_1_a6,
     author = {Par{\'\i}zek, Bohum{\'\i}r and Schwarz, \v{S}tefan},
     title = {Semi-Characters of the {Multiplicative} {Semigroup} of {Integers} {Modulo} $m$},
     journal = {Mathematica slovaca},
     pages = {63--74},
     year = {1961},
     volume = {11},
     number = {1},
     mrnumber = {0139682},
     zbl = {0104.01901},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1961_11_1_a6/}
}