Usmiyatun, U., R. Darmayanti, N. D. Safitri, and A. Afifah. “Cognitive Style, Thinking Ability, Mathematical Problems, How Do Students Solve Open-Ended Problems?”. AMCA Journal of Science and Technology, vol. 1, no. 2, Aug. 2021, doi:10.51773/ajst.v1i2.276.