Irawan, A. and Surya, E. (2017) “Application of the Open Ended Approach to Mathematics Learning in the Sub-subject of Rectangular”, International Journal of Sciences: Basic and Applied Research (IJSBAR), 33(3), pp. 270–279. Available at: https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/7539 (Accessed: 6 May 2024).