@article{DMGT_2010_30_4_a7,
     author = {Agnarsson, Geir and Halld\'orsson, Magn\'us},
     title = {Vertex coloring the square of outerplanar graphs of low degree},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {619--636},
     publisher = {mathdoc},
     volume = {30},
     number = {4},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_2010_30_4_a7/}
}