Information on Cobra in Dutch and English.
Short history on Constant and Cobra with comments of Jan Elburg.
The New Babylon project, part of the museum's masterpieces with some links to secondary materials in Dutch.
Database website of more than 800.000 images from 133 collections of 100 art organizations in the Netherlands.
Item on graphic New Babylon work that was donated to the town of Meppel in 1967 which was eventually lost.
Extensive background information about the Situationist International and Constant in English.