dafik, Jean Claudia Joedo, and I Made Tirta. “On Improving the Students’ Combinatorial Thinking Skill in Solving Rainbow Antimagic Colouring Problem on Cryptography for E-Commerce Security Systems under the Implementation of Research-Based Learning With STEM Approach”. Innovare Journal of Education 10, no. 5 (September 1, 2022): 21–30. Accessed December 22, 2024. https://mail.innovareacademics.in/journals/index.php/ijoe/article/view/45596.