SUPRAYITNO, Hitapriya. Searching the Correct and Appropriate Deterrence Function General Formula for Calculating Gravity Trip Distribution Model. IPTEK The Journal of Engineering, [S. l.], v. 4, n. 3, p. 17–25, 2025. Disponível em: https://journal.its.ac.id/index.php/joe/article/view/8027. Acesso em: 27 jan. 2026.