Agoestanto, Arief, Ary Woro Kurniasih, Muhammad Zuhair Zahid, and Mulyono Mulyono. 2017. “Enhancement of Lecturer Professionalism Using Lesson Study Approach for Curriculum Review of Mathematics 1”. Unnes Journal of Mathematics Education 6 (3), 299-307. https://doi.org/10.15294/ujme.v6i3.19506.