Hung, N.Q., Hai, V.H., Tuyet, T.K. and Tuan, H.L. 2016. A Low Background Gamma Ray Spectrometer with Anticosmic Shielding. Communications in Physics. 26, 1 (Jul. 2016), 93. DOI:https://doi.org/10.15625/0868-3166/26/1/7474.