@article {ekim2008polarity,
	title = {Polarity of chordal graphs},
	journal = {Discrete Applied Mathematics},
	volume = {156},
	number = {13},
	year = {2008},
	pages = {2469{\textendash}2479},
	publisher = {Elsevier},
	author = {Ekim, Tinaz and Hell, Pavol and Stacho, Juraj and de Werra, Dominique}
}
