@article {demange2006approximation,
	title = {On the approximation of Min Split-coloring and Min Cocoloring.},
	journal = {J. Graph Algorithms Appl.},
	volume = {10},
	number = {2},
	year = {2006},
	pages = {297{\textendash}315},
	author = {Demange, Marc and Ekim, Tinaz and de Werra, Dominique and others}
}
