WIDODO, S.; KATMININGSIH, Y.; NURWIANI, N. Development of hots mathematic problems (higher order thinking skills) Based on Crulic & Rudnick Taxonomy. Jurnal Math Educator Nusantara: Wahana Publikasi Karya Tulis Ilmiah di Bidang Pendidikan Matematika, v. 7, n. 1, p. 48-63, 29 May 2021.