Ishartono, N., A. Nurcahyo, M. Waluyo, H. J. Prayitno, and M. Hanifah. “Integrating GeoGebra into the Flipped Learning Approach to Improve students’ Self-Regulated Learning During the Covid-19 Pandemic”. Journal on Mathematics Education, vol. 13, no. 1, Jan. 2022, pp. 69-86, doi:10.22342/jme.v13i1.pp69-86.