@article{10_4153_CJM_2011_084_9,
     author = {Harutyunyan, Ararat and Kayll, P. Mark and Mohar, Bojan and Rafferty, Liam},
     title = {Uniquely {D-colourable} {Digraphs} with {Large} {Girth}},
     journal = {Canadian journal of mathematics},
     pages = {1310--1328},
     year = {2012},
     volume = {64},
     number = {6},
     doi = {10.4153/CJM-2011-084-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2011-084-9/}
}