Hollander, K., van der Zwaard, B. C., de Villiers, J. E., Braumann, K., Venter, R., & Zech, A. (2016). The effects of being habitually barefoot on foot mechanics and motor performance in children and adolescents aged 6–18 years: Study protocol for a multicenter cross-sectional study (Barefoot LIFE project). J Foot Ankle Res.

Hollander, Karsten, Babette C. van der Zwaard, Johanna Elsabe de Villiers, Klaus-Michael Braumann, Ranel Venter, a Astrid Zech. "The Effects of Being Habitually Barefoot On Foot Mechanics and Motor Performance in Children and Adolescents Aged 6–18 Years: Study Protocol for a Multicenter Cross-sectional Study (Barefoot LIFE Project)." J Foot Ankle Res 2016.

Hollander, Karsten, et al. "The Effects of Being Habitually Barefoot On Foot Mechanics and Motor Performance in Children and Adolescents Aged 6–18 Years: Study Protocol for a Multicenter Cross-sectional Study (Barefoot LIFE Project)." J Foot Ankle Res 2016.