MAYURI ODELA, V. SANDHYA RANI. ARTICLE ON DISCRETE MATHEMATICS. INTERNATIONAL JOURNAL OF MANAGEMENT RESEARCH AND REVIEW, India, v. 9, n. 4, p. 1–4, 2019. Disponível em: https://ijmrr.com/index.php/ijmrr/article/view/531. Acesso em: 17 sep. 2026.