@article{Feddag2005,
	title = {Generalized estimating equations for longitudinal mixed Rasch model},
	author = {Mohand L. Feddag and Mounir Mesbah},
	day = {15},
	journal = {Journal of Statistical Planning and Inference},
	month = {Feb},
	number = {1-2},
	pages = {159--179},
	url = {http://www.sciencedirect.com/science/article/B6V0M-4D4XMKP-5/1/872c495520a7054e036e43db936d99f9},
	volume = {129},
	year = {2005},
	biburl = {http://www.bibsonomy.org/bibtex/2b4eeb6ef8b0117b8d5fedff56deffcd6/smicha},
	keywords = {IRT models }
}