M. Ichsan and H. Hutrianto, “Implementasi Algoritma Vignere Chiper Berbasis QRCode Untuk Absensi Pegawai PT. Delameta Bilano Cabang Ruas Tol Palembang - Inderalaya”, Journal of Software Engineering Ampera, vol. 3, no. 3, pp. 170–185, Oct. 2022.