Article on Constant in OKV, 11e editie.
Short bio and a text by Constant from Cobra magazine, nr. 4, 1949.
Article on Constant and New Babylon by Fanny Kelk for Insight Holland in the Holland Herald, Edition 12, nr 11, 1977
A television course with accompanying course book: Openbaar Kunstbezit tv. Constant | Schilderijen, constructies, Nieuw Babylon is part of the episode of July 7, 1965 in the third year.