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Widyaningrum, Retno and Kartowagiran, Badrun and Jailani, Jailani (2020) The Characteristics of High-Risk Tryout Test Items for Indonesian Elementary Schools Students. Universal Journal of Educational Research, 8 (6). pp. 2634-2640.
Kartowagiran, Badrun and Widyaningrum, Retno and Jailani, Jailani (2020) How the Novelty of Students' Answers in Solving Mathematical Problems? Universal Journal of Educational Research, 8 (11). pp. 5351-5360. ISSN ISSN: 2332-3205 (Print) ISSN: 2332-3213 (Online)