Ilmadi, I., Zarista, R., Aden, A. and Sastro, G. (2020) “The Effectiveness of Online Learning for Mathematics Students during the Covid-19 Pandemic”, Jurnal Cendekia : Jurnal Pendidikan Matematika, 4(2), pp. 1273-1282. doi: 10.31004/cendekia.v4i2.372.