Kuhn, Angela Danielle, and Fabio de Oliveira Neves. “Solid Waste and the Solution of Local Problems in Peripheral Districts: A Case Study of Valuable Trash Program in Umuarama - PR”. GEOGRAFIA (Londrina), vol. 28, no. 2, July 2019, pp. 165-84, doi:10.5433/2447-1747.2019v28n2p165.