BARANOW, Andrzej. Anna Kaupuż and her secret letters with Aleksandr Solzhenitsyn . Bibliotekarz Podlaski, [S. l.], v. 45, n. 4, p. 211–229, 2019. DOI: 10.36770/bp.226. Disponível em: https://bibliotekarzpodlaski.pl/index.php/bp/article/view/226. Acesso em: 20 jun. 2025.