@article{DMGT_2013_33_2_a13,
     author = {Phinezy, Bryan and Zhang, Ping},
     title = {On {Closed} {Modular} {Colorings} of {Trees}},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {411--428},
     publisher = {mathdoc},
     volume = {33},
     number = {2},
     year = {2013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_2013_33_2_a13/}
}