Santos, Gilberto, Bruno Figueiredo, Sandro Carvalho, and João Carlos Silva. “Technology Innovation to Apply the Freecycle Concept: Background, Evolution and Technological Solutions”. Quality Innovation Prosperity 27, no. 3 (December 1, 2023): 89–108. Accessed May 13, 2024. https://qip-journal.eu/index.php/QIP/article/view/1928.