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Artistic radicalism and radical conservatism: Moïssy Kogan and his German patrons, 1903 - 1928
ART-Dok (Virtual Library for Art, Heidelberg University), 1997
BASE - Bielefeld Academic Search Engine , ART-Dok (Virtual Library for Art, Heidelberg University)
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Projeto construtivo brasileiro e as exposições de arte concreta e neoconcreta na Alemanha: desejos da forma ; Das brasilianische konstruktiv-Projekt und die Ausstellungen Konkrete und Neokonkrete Kunst in Deutschland: Verlangen nach Form
Freie Universität Berlin: Refubium (FU Berlin), 2020
BASE - Bielefeld Academic Search Engine , Freie Universität Berlin: Refubium (FU Berlin)