Luong, Viet, 		Pham, Cong, 		nguyen, Dinh, 		Nguyen, Tuyen, AND 		Bach, Cong.
" Structural phase transition in some perovskite materials materials having positive thermoresistive coefficient" <em>VNU Journal of Science: Mathematics - Physics</em> [Online], Volume 20 Number 3AP (26 April 2017)