@article{Zacks1986,
	title = {A note on the missing value principle and the EM-Algorithm for estimation
	and prediction in sampling from finite populations with a multinormal
	superpopulation model},
	author = {S. Zacks and Josemar Rodriguez},
	journal = {Statistics \& Probability Letters},
	month = {Jan},
	number = {1},
	pages = {35--37},
	url = {http://www.sciencedirect.com/science/article/B6V1D-47N62NJ-27/1/9b0740480e4bb1747ffa274853dcd282},
	volume = {4},
	year = {1986},
	biburl = {http://www.bibsonomy.org/bibtex/21db88cbf2da264dcf0fe5e42b86356ed/smicha},
	keywords = {missing principle value }
}