PHOMMANITH , K., KEOPHASITH, V., BOUSITH, O., DOUNGCHAN , B. and SAYDUANGTA, S. (2020) “The Effect Of Problem-Based Learning Instruction Activities on Problem Solving skills and Mathematical Connection skills of third year Students”, Souphanouvong University Journal Multidisciplinary Research and Development , 6(2), pp. 104–112. Available at: http://www.su-journal.com/index.php/su/article/view/271 (Accessed: 17 January 2026).