Uyen, B. P., D. H. Tong, N. P. Loc, and L. N. P. Thanh. “The Effectiveness of Applying Realistic Mathematics Education Approach in Teaching Statistics in Grade 7 to Students’ Mathematical Skills”. Journal of Education and E-Learning Research, vol. 8, no. 2, Apr. 2021, pp. 185-97, doi:10.20448/journal.509.2021.82.185.197.