Pham, Hung, Viet, Nguyen Quoc, Anh, Le Xuan, Tam, Nguyen Thi Thanh, Trung, Nguyen Ba, Hong, Tran Thi, Hai, Nguyen Xuan, Nhan, Phan Thi Thanh, AND Dung, Le Thi Kim. " Study on the Effect of Biochar Combined with Organic Fertilizer on the Development of Plants on Sandy Soil in the Central Coast" VNU Journal of Science: Earth and Environmental Sciences [Online], Volume 35 Number 1 (26 March 2019)