Lu, N. K., T. H. Duong, K. T. Nguyen, M. X. Vo, and T. M. V. Le. “Effects of Van Hiele Theory-Based Instruction on Pre-Service Mathematics Teachers’ Geometry Knowledge, Geometric Thinking Skills and Attitudes: A Literature Review”. Vietnam Journal of Education, vol. 10, no. 4, Aug. 2026, doi:10.52296/vje.2026.903.