Tokarz, B., E. Kohlbeck, F. H. Beuren, A. B. Fagundes, and D. Pereira. “Methods and Tools for the Development of a Product-Service System: Proposal of a Conceptual Model”. Brazilian Journal of Operations & Production Management, vol. 19, no. 3, Oct. 2021, pp. 1-19, doi:10.14488/BJOPM.2021.046.