Improved Crow Algorithm for Soft Time Window Multimodal 4PL Routing Problem
TANG Huaidong, LU Fuqiang, WANG Leizhen, WANG Suxin, BI Hualing
Computer Engineering and Applications . 2022, (3): 274 -281 .  DOI: 10.3778/j.issn.1002-8331.2008-0187