D. . Ulfa, M. Maimunah, and Y. . Roza, “Analysis of students’ mathematical connection ability based on self-confidence of class VIII junior high school students”, J. Math Educ. Nusant. Wahana Publ. Karya Tulis Ilm. di Bid. Pendidik. Mat., vol. 7, no. 2, pp. 111–120, Nov. 2021.