KACZMARCZYK, Waldemar. Extended Model Formulation of the Proportional Lot-Sizing and Scheduling Problem with Lost Demand Costs. Decision Making in Manufacturing and Services, [S. l.], v. 5, n. 1, p. 49–56, 2011. DOI: 10.7494/dmms.2011.5.1.49. Disponível em: https://journals.agh.edu.pl/dmms/article/view/535. Acesso em: 8 apr. 2025.