 He contributed to the publications "Ça Ira", "Le Centaure" and "Sélection" and befriended Jean Metzinger and Albert Gleizes when they published "Du Cubisme".In 1921 he had an exhibition abroad for the first time (the exhibition of the Dutch artistic group De Branding with Kurt Schwitters and Fokko Mees).In 1925 he became a member of Contemporary Art (Kunst van Heden).