Posthumus, A. G., Borsboom, G. J., Poeran, J., Steegers, E. A. P., & Bonsel, G. J. (2016). Geographical, Ethnic and Socio-Economic Differences in Utilization of Obstetric Care in the Netherlands. PLoS One.

Posthumus, Anke G., Gerard J. Borsboom, Jashvant Poeran, Eric A. P. Steegers, και Gouke J. Bonsel. "Geographical, Ethnic and Socio-Economic Differences in Utilization of Obstetric Care in the Netherlands." PLoS One 2016.

Posthumus, Anke G., et al. "Geographical, Ethnic and Socio-Economic Differences in Utilization of Obstetric Care in the Netherlands." PLoS One 2016.