NGUYEN, Ngoc Quang; NGUYEN, Duc Nghia; NGUYEN, Khanh Phuong. Two-Echelon Multi-Trip Multi-Traffic Pickup and Delivery Problem with Time Windows and Synchronization. JST: Smart Systems and Devices, [S. l.], v. 31, n. 1, p. 25–32, 2021. DOI: 10.51316/jst.150.ssad.2021.31.1.4. Disponível em: https://jst.vn/index.php/ssad/article/view/92. Acesso em: 18 jun. 2025.