Arifin, M., H. Suyitno, N. Dewi, and W. Wardono. “Kemampuan Berpikir Kreatif Matematis Melalui Problem Based Learning Berbantuan Mobile Learning Era Disrupsi”. PRISMA, Prosiding Seminar Nasional Matematika, Vol. 2, Feb. 2019, pp. 376-83, https://journal.unnes.ac.id/sju/prisma/article/view/28958.