Media type: E-Article Title: Graph based twin cost matrices for unbalanced assignment problem with improved ant colony algorithm Contributor: Wang, Liuyi; He, Zongtao; Liu, Chengju; Chen, Qijun Published: Elsevier BV, 2021 Published in: Results in Applied Mathematics, 12 (2021), Seite 100207 Language: English DOI: 10.1016/j.rinam.2021.100207 ISSN: 2590-0374 Origination: Footnote: Access State: Open Access