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Ruijsbroek, Annemarie, Alet H. Wijga, Marjan Kerkhof, Gerard H. Koppelman, Henriette A. Smit, and Mariël Droomers. The Development of Socio-economic Health Differences in Childhood: Results of the Dutch Longitudinal PIAMA Birth Cohort. BioMed Central, 2011.

Ruijsbroek, Annemarie, et al. The Development of Socio-economic Health Differences in Childhood: Results of the Dutch Longitudinal PIAMA Birth Cohort. BioMed Central, 2011.