Mathews, C., Eggers, S. M., de Vries, P. J., Mason-Jones, A. J., Townsend, L., Aarø, L. E., & De Vries, H. (2015). Reaching the hard to reach: Longitudinal investigation of adolescents’ attendance at an after-school sexual and reproductive health programme in Western Cape, South Africa. BMC Public Health.

Mathews, Catherine, Sander Matthijs Eggers, Petrus J. de Vries, Amanda J. Mason-Jones, Loraine Townsend, Leif Edvard Aarø, a Hein De Vries. "Reaching the Hard to Reach: Longitudinal Investigation of Adolescents’ Attendance At an After-school Sexual and Reproductive Health Programme in Western Cape, South Africa." BMC Public Health 2015.

Mathews, Catherine, et al. "Reaching the Hard to Reach: Longitudinal Investigation of Adolescents’ Attendance At an After-school Sexual and Reproductive Health Programme in Western Cape, South Africa." BMC Public Health 2015.