Winter, J.M. van. “R.E.V. Stuip, Meer Dan Muziek Alleen. In Memoriam Kees Vellekoop”. BMGN - Low Countries Historical Review 120, no. 2 (January 1, 2005): 270-271. Accessed May 5, 2021. https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-107104.