SUNTUSIA, S.; DAFIK, D.; HOBRI, H. THE LEVEL OF CRITICAL THINKING SKILL ON SOLVING TWO-DIMENSIONAL ARITHMETICS PROBLEMS THROUGH RESEARCH-BASED LEARNING. Alifmatika: Jurnal Pendidikan dan Pembelajaran Matematika, v. 3, n. 1, p. 55-69, 19 Apr. 2021.