^Kähler, Christoph (14 December 2016). "Niederländische Theologin Hebe Kohlbrugge ist verstorben" [Dutch theologian Hebe Kohlbrugge has died] (Press release) (in German). Evangelical Church in Central Germany. Archived from the original on 20 December 2016. Retrieved 5 October 2022.
^"Flyby boven Breda voor overleden Frits Jan Willem den Ouden | Bredavandaag". www.bredavandaag.nl (in Dutch). Retrieved 2018-04-08.