Merlo, J., Yang, M., Chaix, B., Lynch, J., & Rastam, L. (2005). A brief conceptual tutorial on multilevel analysis in social epidemiology: Investigating contextual phenomena in different groups of people. BMJ Group.

Merlo, J., M. Yang, B. Chaix, J. Lynch, و L. Rastam. A Brief Conceptual Tutorial On Multilevel Analysis in Social Epidemiology: Investigating Contextual Phenomena in Different Groups of People. BMJ Group, 2005.

Merlo, J., et al. A Brief Conceptual Tutorial On Multilevel Analysis in Social Epidemiology: Investigating Contextual Phenomena in Different Groups of People. BMJ Group, 2005.