Nghia, Nguyen, 		Hoa, Bui, 		Thom, Nguyen, AND 		Khiem, Le.
" Preliminary Results of PIXE Analysis of Mosses  for Air Pollution Monitoring in Hanoi Using Pelletron Accelerator" <em>VNU Journal of Science: Mathematics - Physics</em> [Online], Volume 33 Number 2 (27 June 2017)