Dung, Tran, 		An, Pham, 		Duong, Tran, 		Man, Nguyen, 		Thi Minh Hien, Nguyen, AND 		Hai Duc, Tran.
" Excess Conductivity Analyses in Bi-Pb-Sr-Ca-Cu-O  Systems Sintered at Different Temperatures" <em>VNU Journal of Science: Mathematics - Physics</em> [Online], Volume 37 Number 4 (3 December 2021)