DIE GESCHICHTE DER SAMMLUNG DES RIGAER STADTTHEATERS. Mūzikas akadēmijas raksti, Riga, Latvia, v. 2, p. 6–13; 23, 2024. Disponível em: https://www.scriptamusica.lv/index.php/mar/article/view/225.. Acesso em: 5 may. 2025.