Ahadi, F., Z. Zaenuri, and A. Cahyono. “Exploration of Ethnomatematics in the Samin Tribe and Its Relationship With Mathematical Concepts”. Unnes Journal of Mathematics Education Research, Vol. 10, no. A, Jan. 2020, pp. 184-9, http://journal.unnes.ac.id/sju/ujmer/article/view/37082.