@article {tu2005bartlett,
	title = {A Bartlett type correction for Rao{\textquoteright}s score test in Cox regression model},
	journal = {Sankhy\=a: The Indian Journal of Statistics},
	year = {2005},
	pages = {722{\textendash}735},
	publisher = {JSTOR},
	author = {Tu, Dongsheng and Chen, Jiahua and Shi, Peide and Wu, Yaohua}
}
