@article{Bull1999,
	title = {Parallel implementation of a multilevel modelling package},
	author = {J. M. Bull and G. D. Riley and J. Rasbash and H. Goldstein},
	day = {28},
	journal = {Computational Statistics \& Data Analysis},
	month = {Oct},
	number = {4},
	pages = {457--474},
	url = {http://www.sciencedirect.com/science/article/B6V8V-3XX6B05-6/1/36d7e9d04e91b4119f575f2a15dd2f73},
	volume = {31},
	year = {1999},
	biburl = {http://www.bibsonomy.org/bibtex/23472590c378f980f2e23a8a4c88248e8/smicha},
	keywords = {Multilevel models }
}