Taufiq Iqbal, Syarifuddin. “Repository Development Based on the Archive Initiative Protocol for Metadata Harvesting (OAI-PMH) on METS and MPEG-21 DIDL”. International Journal of Advanced Science and Technology, Vol. 29, no. 3, Mar. 2020, pp. 13573 -79, https://sersc.org/journals/index.php/IJAST/article/view/31687.