@article {chen2002statistical,
	title = {Statistical inference on comparing two distribution functions with a possible crossing point},
	journal = {Statistics \& probability letters},
	volume = {60},
	number = {3},
	year = {2002},
	pages = {329{\textendash}341},
	publisher = {Elsevier},
	author = {Chen, Guijing and Chen, Jiahua and Chen, Yuming}
}
