Doig, Allan. “De Stijl and Russian Art: Alexandre Archipenko, El Lissitzky, Theo Van Doesburg; Cubism, Proun, Elementarism”. Actual Problems of Theory and History of Art 6 (October 11, 2016): 606–613. Accessed December 5, 2025. https://publ.actual-art.org/aptha/article/view/10484.