Insights into the composition and properties of fly ash emissions from a municipal solid waste power plant oleh Tra Mai Ngo, Van Hung Hoang, Huu Tap Van, Hang Nguyen Thi Thuy, Hong Khuat Thi, Nghiem Thi Ha Lien, Nguyen Trong Nghia, Phan Thi Thanh Hang, Vu Duc Toan, Trinh Thi Tham, Nguyen Thi Hoa