@article{10_4153_CMB_2007_062_0,
     author = {Zelenyuk, Yevhen and Zelenyuk, Yuliya},
     title = {Transformations and {Colorings} of {Groups}},
     journal = {Canadian mathematical bulletin},
     pages = {632--636},
     year = {2007},
     volume = {50},
     number = {4},
     doi = {10.4153/CMB-2007-062-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2007-062-0/}
}