Tigas Laila Nurpratiwi, and Rini Setianingsih. “STUDENTS’ THINKING PROCESSES IN SOLVING OPEN-ENDED PROBLEMS USING ONLINE LEARNING TAKING INTO ACCOUNT THE MATHEMATICAL ABILITY”. Pi: Mathematics Education Journal 4, no. 1 (March 30, 2021): 20–30. Accessed December 6, 2025. http://ejournal.unikama.ac.id/index.php/pmej/article/view/5288.