SOSTAKS, Alexander. Mathematics in the context of fuzzy sets: basic ideas, concepts, and some remarks on the history and recent trends of development. Mathematical Modelling and Analysis, [S. l.], v. 16, n. 2, p. 173–198, 2011. DOI: 10.3846/13926292.2011.578264. Disponível em: https://journals.vilniustech.lt/index.php/MMA/article/view/5523. Acesso em: 2 jun. 2025.