DAFIK; JOEDO, J. C.; TIRTA, I. M. . 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, [S. l.], v. 10, n. 5, p. 21–30, 2022. DOI: 10.22159/ijoe.2022v10i5.45596. Disponível em: https://innovareacademics.in/journals/index.php/ijoe/article/view/45596. Acesso em: 8 dec. 2022.