GDOK-KLAFKOWSKA, Małgorzata. A few words about Nicholas Roerich’s Swedish connections. Studia Rossica Gedanensia, [S. l.], n. 4, p. 363–367, 2017. Disponível em: https://czasopisma.bg.ug.edu.pl/index.php/SRG/article/view/64. Acesso em: 15 maj. 2025.