An integrated model for solving production planning and production capacity problems using an improved fuzzy model for multiple linear programming according to Angelov’s method. Periodicals of Engineering and Natural Sciences, [S. l.], v. 9, n. 3, p. 715–724, 2021. DOI: 10.21533/pen.v9.i3.884. Disponível em: https://pen.ius.edu.ba/index.php/pen/article/view/884. Acesso em: 21 apr. 2026.