@article {zucker2013testing,
	title = {Testing for a changepoint in the Cox survival regression model},
	journal = {Journal of Statistical Theory and Practice},
	volume = {7},
	year = {2013},
	pages = {360{\textendash}380},
	publisher = {Springer},
	author = {Zucker, David M and Agami, Sarit and Spiegelman, Donna}
}
