Zulkardi, Zulkardi, Ratu Ilma Indra Putri, Zahra Alwi, Duano Sapta Nusantara, Sahala Martua Ambarita, Yulianita Maharani, and Linda Puspitasari. 2020. “How Students Work With Pisa-Like Mathematical Tasks Using Covid-19 Context”. Journal on Mathematics Education 11 (3):405-16. https://jme.ejournal.unsri.ac.id/index.php/jme/article/view/3744.