Nailufar, Yuyun, Safruddin Safruddin, and Moh. Irawan Zain. 2021. “Analysis of Teacher Difficulties in Online Learning on Mathematics Subjects”. Prisma Sains : Jurnal Pengkajian Ilmu Dan Pembelajaran Matematika Dan IPA IKIP Mataram 9 (2):280-88. https://doi.org/10.33394/j-ps.v9i2.4376.