R. BALAKUMAR , D.; SOUNDHARYA , M. Fuzzy Arithmetic and Extension Principle. International Journal on Future Revolution in Computer Science & Communication Engineering, [S. l.], v. 4, n. 8, p. 48 –, 2018. Disponível em: https://www.ijfrcsce.org/index.php/ijfrcsce/article/view/1720. Acesso em: 3 feb. 2023.