Richard, F. Nonyelum, y Sh. Golkarian. «Architectural Conservation of the Rock-Hewn Churches of Lalibela, Ethiopia: A Study on Preservation and Socio-Economic Conservation». Amazonia Investiga 12, no. 67 (agosto 30, 2023): 127–138. Accedido noviembre 26, 2025. https://amazoniainvestiga.info/index.php/amazonia/article/view/2458.