Verhoeven, Geert, Stefan Wogrin, Jona Schlegel, Martin Wieser, and Benjamin Wild. “Facing a Chameleon—How Project INDIGO Discovers and Records New Graffiti”. document | archive | disseminate graffiti-scapes (May 10, 2023): 63 - 85. Accessed June 25, 2024. https://journals.ap2.pt/index.php/indigo/article/view/703.