Siskawati, Fury Styo. “Effectiveness of Using ‘PAKSOBRI’ With Quiz Faber to Improve Students’ Problem Solving Abilities at Islamic University of Jember”. Jurnal Axioma : Jurnal Matematika Dan Pembelajaran, vol. 4, no. 1, Jan. 2019, pp. 7-15, doi:10.36835/axi.v4i1.339.