Reduce Phase Unbalance with Cross-phase of PV and EV Chargers, using Convex Optimization on Quadratic Constraint in Distribution Network. - Thanh-Hoan Nguyen; Viet Anh Truong; Huu-Vinh Nguyen; Dinh-Nhon Truong; Quang-Thai-Dan Nguyen; Thanh-Nhan Nguyen (ICSSE, 2023)