Kaczmarczyk, Waldemar. “Corrigendum to ”Extended Model Formulation of the Proportional Lot-Sizing and Scheduling Problem With Lost Demand Costs””. Decision Making in Manufacturing and Services, vol. 8, no. 1-2, Feb. 2015, pp. 41-41, https://doi.org/10.7494/dmms.2014.8.1.41.