
@article{karrison2016,
	title = {Versatile Tests for Comparing Survival Curves Based on Weighted Log-rank Statistics},
	author = {{Karrison}, {Theodore G.}},
	year = {2016},
	month = {09},
	date = {2016-09},
	journal = {The Stata Journal: Promoting communications on statistics and Stata},
	pages = {678--690},
	volume = {16},
	number = {3},
	langid = {en}
}

@article{prior2020,
	title = {Group sequential monitoring based on the maximum of weighted log-rank statistics with the Fleming{\textendash}Harrington class of weights in oncology clinical trials},
	author = {{Prior}, {Thomas J}},
	year = {2020},
	month = {06},
	date = {2020-06-10},
	journal = {Statistical Methods in Medical Research},
	pages = {3525--3532},
	volume = {29},
	number = {12},
	langid = {en}
}
