Nguyen Thi, Hong Thinh, Hoai Vu, Lan Anh Ha, Van Giap Trinh, and Van Vuong Nguyen. “A Procedure of Determining Carbon-13 Composition in Soil Organic Carbon on an Isotope Ratio Mass-Spectrometer”. Nuclear Science and Technology 8, no. 1 (March 30, 2018): 23-28. Accessed October 6, 2024. http://old.vinatom.gov.vn/index.php/nst/article/view/80.