JANA, P. Pembinaan Olimpiade Matematika Kelas VA CI SD Negeri Ungaran I Yogyakarta. J-Dinamika : Jurnal Pengabdian Masyarakat, [S. l.], v. 2, n. 2, 2018. DOI: 10.25047/j-dinamika.v2i2.527. Disponível em: https://publikasi.polije.ac.id/index.php/j-dinamika/article/view/527. Acesso em: 28 oct. 2021.