TY  - BOOK
A1  - Snijders, T.A.B.
A1  - Bosker, R.J.
T1  - Multilevel analysis: An introduction to basic and advanced multilevel modeling. 
Y1  - 2011
DO  - 10.1007/978-3-642-04898-2_387
CY  - London
PB  - Sage

ER  -