TY  - JOUR
A1  - Maas, C.J.M.
A1  - Hox, J.J.
T1  - Sufficient sample sizes for multilevel modeling
Y1  - 2005
DO  - 10.1027/1614-2241.1.3.85
JF  - Methodology
VL  - 1
IS  - 3
SP  - 86
EP  - -92

ER  -