Yuniarti, N., F. Firdausi, and G. Dwirahayu. “Implementing Bruner’s Theory in Teaching Angles on a Circle to Enhance Problem-Solving Skills”. Journal of Mathematics Instruction, Social Research and Opinion, vol. 4, no. 4, Oct. 2025, pp. 1051-64, doi:10.58421/misro.v4i4.698.