Ngoc, Le, 		Huyen, Nguyen, AND 		Quang, Nguyen.
" Study on Monte-Carlo calculation of  peak efficiencies of  the superpure Hp Ge detector (Gmx) in environmental gamma  spectrometry with using MCNP4C2" <em>VNU Journal of Science: Mathematics - Physics</em> [Online], Volume 23 Number 2 (15 June 2007)