Thu, Tran, Trieu Thi Khanh Ly, & Nguyen Thi Hue. " Effects of Soil Properties on the Accumulation and Bioavailability of Copper in the Orange Growing Soil in Cao Phong, Hoa Binh." VNU Journal of Science: Earth and Environmental Sciences [Online], 40.1S (2024): n. pag. Web. 22 Jan. 2025