@article{Browne2001,
author = {Browne, W.J. and Goldstein, H. and Rasbash, J.},
title= {Multiple Membership Multiple Classification (MMMC) models},
year = {2001},
doi = {10.1177/1471082X0100100202},
journal = {Statistical Modelling},
volume = {1},
number = {2},
pages = {103--124},
}