Köenig, Marília, et al. “Dialogue Between the Community and Coal Industries: Community Perception Research Based on Social and Environmental Indicators”. Revista E-TECH: Tecnologias Para Competitividade Industrial - ISSN - 1983-1838, vol. 5, no. 1, Oct. 2012, pp. 89-101, doi:10.18624/e-tech.v5i1.180.