@article{BMMS_2011_34_1_a14,
     author = {Jian-Ting Sheng and Gui-Zhen Liu},
     title = {A {Note} on \([r, s, c, {t]\)-Colorings} of {Graphs}},
     journal = {Bulletin of the Malaysian Mathematical Society},
     year = {2011},
     volume = {34},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/BMMS_2011_34_1_a14/}
}