TY  - JOUR
A1  - Maas, C.J.M.
A1  - Hox, J.J. 
T1  - Sufficient sample sizes for multilevel modeling
Y1  - 2005
DO  - 10.1027/1614-2241.1.3.86
JF  - Methodology
VL  - 1
IS  - 3

ER  -