Gumelar, Bintang, Guruh Darma Putra, and Dwi Amadi. “Mikrotik VPN Shielding E-Link Health Reports: Strengthening Data Security at Madiun Health Office”. Journal of Information Systems and Informatics 5, no. 3 (September 11, 2023): 1194-1203. Accessed December 19, 2025. https://journal-isi.org.adsii.or.id/index.php/isi/article/view/524.