Kerkum, Y. L., Harlaar, J., Buizer, A. I., van den Noort, J. C., Becher, J. G., & Brehm, M. (2013). Optimising Ankle Foot Orthoses for children with Cerebral Palsy walking with excessive knee flexion to improve their mobility and participation; protocol of the AFO-CP study. BioMed Central.

Kerkum, Yvette L., Jaap Harlaar, Annemieke I. Buizer, Josien C. van den Noort, Jules G. Becher, and Merel-Anne Brehm. Optimising Ankle Foot Orthoses for Children With Cerebral Palsy Walking With Excessive Knee Flexion to Improve Their Mobility and Participation; Protocol of the AFO-CP Study. BioMed Central, 2013.

Kerkum, Yvette L., et al. Optimising Ankle Foot Orthoses for Children With Cerebral Palsy Walking With Excessive Knee Flexion to Improve Their Mobility and Participation; Protocol of the AFO-CP Study. BioMed Central, 2013.