Susilo, Bambang Eko, Darhim Darhim, and Sufyani Prabawanto. “Students Critical Thinking Skills Toward Concepts Differences in Finding Area of a Plane Region and Definite Integral”. Unnes Journal of Mathematics Education 8, no. 1 (March 29, 2019): 1-7. Accessed November 30, 2024. https://journal.unnes.ac.id/sju/ujme/article/view/29463.