@article {chen2003empirical,
	title = {Empirical likelihood confidence intervals for the mean of a population containing many zero values},
	journal = {The Canadian Journal of Statistics/La Revue Canadienne de Statistique},
	year = {2003},
	pages = {53{\textendash}68},
	publisher = {Statistical Society of Canada},
	author = {Chen, Jiahua and Chen, Shun-Yi and Rao, JNK}
}
