Ibrahim, Cecep. “Relationship of Input and Output Variables With DEA (Data Envelopment Analysis) Approach: Efficiency Implementation Study in Library Science Journal SINTA 2 and 3”. Publication Library and Information Science 7, no. 2 (March 15, 2024): 39–58. Accessed October 26, 2025. http://journal.umpo.ac.id/index.php/PUBLIS/article/view/7778.