Caitong Yue Ponnuthurai N. Suganthan Jing J. Liang Boyang Qu 0001 Kunjie Yu Yongsheng Zhu Li Yan 0006 Differential evolution using improved crowding distance for multimodal multiobjective optimization. 100849 2021 62 Swarm Evol. Comput. https://doi.org/10.1016/j.swevo.2021.100849 db/journals/swevo/swevo62.html#YueSLQYZY21