Sofyan, Herry, Meilan Sugiarto, and Bagus Muhammad Akbar. “Implementation of Penetration Testing on Websites to Improve Security of Information Assets UPN ‘Veteran’ Yogyakarta”. Telematika: Jurnal Telematika dan Teknologi Informasi 20, no. 2 (June 30, 2023): 153–162. Accessed December 5, 2025. https://jurnal.upnyk.ac.id/index.php/telematika/article/view/7757.