@article {506936,
	title = {Distortions in Genealogies Due to Purifying Selection and Recombination},
	journal = {Genetics},
	volume = {195},
	year = {2013},
	pages = {221-230},
	url = {http://www.genetics.org/content/195/1/221.full},
	author = {Nicolaisen, LE and Desai, MM}
}
