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van Balkom, Tim D., Henk W. Berendse, Ysbrand D. van der Werf, Jos W. R. Twisk, Iris Zijlstra, Rob H. Hagen, Tanja Berk, Chris Vriend, a Odile A. van den Heuvel. "COGTIPS: A Double-blind Randomized Active Controlled Trial Protocol to Study the Effect of Home-based, Online Cognitive Training On Cognition and Brain Networks in Parkinson’s Disease." BMC Neurol 2019.

van Balkom, Tim D., et al. "COGTIPS: A Double-blind Randomized Active Controlled Trial Protocol to Study the Effect of Home-based, Online Cognitive Training On Cognition and Brain Networks in Parkinson’s Disease." BMC Neurol 2019.