Pluangklang, Thanakorn, 		Rimmai, Areerut, 		Sermsaeng, Kanchana, 		Noibungkha, Sirinapa, 		Lao-ngam, Charoensak, AND 		Chonsalasin, Laddawan.
" Improvement of extraction efficiency for spectrophotometric determination of NO3- and NO2- in Gunshot residues; An application for a shooting distance study" <em>Naresuan University Journal: Science and Technology (NUJST)</em> [Online], Volume 26 Number 3 (24 September 2018)