Mohd Abdul Aziz, Azrul Azwan, et al. “Development and Validating the Number and Mathematical Operations Problem-Solving Framework in the Form of Higher Order Thinking Skill (HOTS) through Bar Model Strategy - A Fuzzy Delphi Methods”. Journal of Science and Mathematics Letters, vol. 11, Nov. 2023, pp. 1-8, https://doi.org/10.37134/jsml.vol11.sp.1.2023.