Information on Cobra in Dutch and English.
Short history on Constant and Cobra with comments of Jan Elburg.
Portrait of Constant his daughter Eva Nieuwenhuys.
NB: We do not have a version fit for print of this image.
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.