Mutated bat algorithm for solving discounted {0-1} knapsack problem
WU Congcong, HE Yichao, CHEN Yiying, LIU Xuejing, CAI Xiufeng
Journal of Computer Applications . 2017, (5): 1292 -1299 .  DOI: 10.11772/j.issn.1001-9081.2017.05.1292