Martalyna, W., I. Isnarto, and M. Asikin. “Students’ Mathematical Literacy Based on Self-Efficacy By Discovery Learning With Higher Order Thinking Skills-Oriented”. Unnes Journal of Mathematics Education Research, Vol. 7, no. 1, July 2018, pp. 54-60, https://journal.unnes.ac.id/sju/ujmer/article/view/23988.