Davier, Matthias Multivariate and Mixture Distribution Rasch Models [electronic resource] by Matthias Davier and Claus H Carstensen - New York Springer 2007 http://dx.doi.org/10.1007/978-0-387-49839-3 ISBN: 9780387498393 Dewey Class. No.: 150.15195 / (e-book)