Langguth, Svann Edmond Marie. «Some Guesswork on a Cultural Expression: Signs on the Wall». CAP - Cadernos de Arte Pública / Public Art Journal 2, no. 2 (Dezembro 30, 2020): 134–145. Acedido Abril 18, 2026. https://cap-journal.org/index.php/CAP/article/view/242.