Vreeken, H. L., van Rens, G. H., Kramer, S. E., Knol, D. L., Festen, J. M., & van Nispen, R. M. (2013). Dual sensory loss: Development of a dual sensory loss protocol and design of a randomized controlled trial. BioMed Central.

Vreeken, Hilde L., Ger HMB van Rens, Sophia E. Kramer, Dirk L. Knol, Joost M. Festen, και Ruth MA van Nispen. Dual Sensory Loss: Development of a Dual Sensory Loss Protocol and Design of a Randomized Controlled Trial. BioMed Central, 2013.

Vreeken, Hilde L., et al. Dual Sensory Loss: Development of a Dual Sensory Loss Protocol and Design of a Randomized Controlled Trial. BioMed Central, 2013.