Computational collective intelligence 12th international conference, ICCCI 2020, Da Nang, Vietnam, November 30 – December 3, 2020, proceedings - Nguyen, Ngoc Thanh 1963-; Hoang, Bao Hung; Huynh, Cong Phap; Hwang, Dosam; Trawiński, Bogdan; Vossen, Gottfried (Lecture notes in computer science, 2020)