Museum Boijmans van Beuningen / fotogr. Helena Van der Kraan, 1996
Wikipedia, 2020-06-17
Information trouvée : Axel en Helena van der Kraan was a sculptor-duo from the Netherlands, consisting of
Axel van der Kraan (born 1949) and Helena van der Kraan-Maazel (born Helena Jirina
Mazl, Prague, Czechoslovakia, 14 June 1940 - died 14 June 2020)