KOCHANOWSKI, Jerzy. Jewish Letters to Hans Frank (1940): Opposition or a Survival Strategy?. Zagłada Żydów. Studia i Materiały, [S. l.], n. Holocaust Studies and Materials, p. 486–498, 2013. DOI: 10.32927/zzsim.835. Disponível em: https://www.zagladazydow.org/index.php/zz/article/view/835. Acesso em: 30 kwi. 2025.