Khadka SR, Bhandari PP. Lexicographic Earliest Arrival Contraflow Evacuation Problem on UPL-TTSP Network. Int. J. Oper. Res. Nep. [Internet]. 2020 Dec. 31 [cited 2024 May 5];9(1):1-7. Available from: https://nepjol.info/index.php/ijorn/article/view/51842