Sindu Arif Rizai, moh. zainudin, and Eka Nurjanah. “Influence Online Learning During a Pandemic at the Understanding Level of Mathematics Lessons Elementary Students”. Journal of Scientific Research, Education, and Technology (JSRET), vol. 2, no. 2, May 2023, pp. 614-22, doi:10.58526/jsret.v2i2.131.