MUHAMMAD ARSHAD; ATIQE UR RAHMAN; MUHAMMAD SAEED. An abstract approach to convex and concave sets under refined neutrosophic set environment. Neutrosophic Sets and Systems, [S. l.], v. 53, p. 274–296, 2023. Disponível em: https://fs.unm.edu/nss8/index.php/111/article/view/3227.. Acesso em: 21 dec. 2024.