Nguyen Thi HT, Vu H, Ha LA, Trinh VG, Nguyen VV. A procedure of determining carbon-13 composition in soil organic carbon on an Isotope Ratio Mass-Spectrometer. Nucl. Sci. and Tech. [Internet]. 2018Mar.30 [cited 2024Oct.6];8(1):23-8. Available from: http://old.vinatom.gov.vn/index.php/nst/article/view/80