@article {koziol1978sequential,
	title = {Sequential testing of the equality of two survival distributions using the modified Savage statistic},
	journal = {Biometrika},
	volume = {65},
	number = {3},
	year = {1978},
	pages = {615{\textendash}623},
	publisher = {Biometrika Trust},
	author = {Koziol, JamesA. and Petkau, A.John}
}
