Wina, Winarti Agustina, and Muhammad Rifqi. 2020. “Implementation Dual Link IPVPN and GSM IPsec Based on Fortigate 50 E at PT XYZ”. Jurnal RESTI (Rekayasa Sistem Dan Teknologi Informasi) 4 (2), 228 -36. https://doi.org/10.29207/resti.v4i2.1465.