Suntusia, S., D. Dafik, and H. Hobri. “THE LEVEL OF CRITICAL THINKING SKILL ON SOLVING TWO-DIMENSIONAL ARITHMETICS PROBLEMS THROUGH RESEARCH-BASED LEARNING”. Alifmatika: Jurnal Pendidikan Dan Pembelajaran Matematika, Vol. 3, no. 1, Apr. 2021, pp. 55-69, doi:10.35316/alifmatika.2021.v3i1.55-69.