ZEIDLER, W. Wolfgang Köhler and Hans Geitel: correspondence 1907-1920. Studia Psychologica: Theoria et praxis, [S. l.], v. 11, n. 2, p. 129–153, 2011. Disponível em: https://czasopisma.uksw.edu.pl/index.php/sp/article/view/2761. Acesso em: 17 apr. 2024.