Video with Tom McDonough (art historian, United States) on Campo nomadi: Constant’s Design for a Gypsy Camp.
Documentation
Pages
Constant (Nieuwenhuys) Amsterdam 1920 – 2005 Utrecht
Short history on Constant and Cobra with comments of Jan Elburg.
Gemeentemuseum
The New Babylon project, part of the museum's masterpieces with some links to secondary materials in Dutch.
Het geheugen van Nederland
Database website of more than 800.000 images from 133 collections of 100 art organizations in the Netherlands.