U. Uswatun Hasanah, V. Vestine, Sabran, and E. N. Wahyuningrum, “ Perancangan Antarmuka Sistem Pengajuan Surat Keterangan Medis Berbasis Web di RSUP Dr. Sardjito Yogyakarta”, bios, vol. 7, no. 2, pp. 191-199, Aug. 2026.