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" <em>VNU Journal of Science: Earth and Environmental Sciences</em> [Online], Volume 35 Number 1 (26 March 2019)