Comparative radiological screening of waste-to-energy and coal-fired-derived bottom ash: a case study from Southern Vietnam - Vo Thanh Nhan; Pham Thi Hue; Nguyen Thi Ngoc Hue; La Ly Nguyen; Phan Truc Lam; Pham Nguyen Ngoc Quynh; Nguyen Hoang Dung; Luu Minh Duc; Le Viet Huy; Ngo Tran; Le Van Toan; Nguyen Quang Hung; et al. (Waste Management, 2026)