Manufacture and general cost analysis of o natural Biopolymerfrom the calyx of Physalis peruviana 1 (uvilla). Revista Universidad de Guayaquil, [S. l.], v. 122, n. 1, p. 12–18, 2016. DOI: 10.53591/rug.v122i1.449. Disponível em: https://revistas.ug.edu.ec/index.php/rug/article/view/257. Acesso em: 5 dec. 2025.