@article{Rao1979,
	title = {General definition and decomposition of projectors and some applications
	to statistical problems},
	author = {C. Radhakrishna Rao and Haruo Yanai},
	journal = {Journal of Statistical Planning and Inference},
	number = {1},
	pages = {1--17},
	url = {http://www.sciencedirect.com/science/article/B6V0M-45FCSY5-C7/1/5fdfcfa39609ad7b525a9503379acd6f},
	volume = {3},
	year = {1979},
	biburl = {http://www.bibsonomy.org/bibtex/2f47de1603140f9c32dcc24570f8dddd4/smicha},
	keywords = {Orthogonal Projector }
}