Maria Frankowska, Umowy międzynarodowe w formie uproszczonej [Accords internationaux en forme simplifée], Wrocław 1981, Ossolineum. Contemporary Central & East European Law, [S. l.], n. 3-4(59-60), p. 62–64, 1983. Disponível em: https://czasopisma.inp.pan.pl/index.php/cceel/article/view/1858. Acesso em: 20 aug. 2025.