“Interoperable Learning Systems Using Open Educational Standards”. Journal of Digital Learning Futures p-ISSN 3117-6054 and e-ISSN 3117-6062 2, no. 2 (June 24, 2025): 9–18. Accessed August 31, 2026. https://galaxiauniverse.com/index.php/JDLF/article/view/389.