Bezerra, P.R.C., Vieira, M.M. e Rezende, J.F.D. de 2019. Measurement of the eco-efficiency of small business in the supply chain oil and gas, applying the taxonomy CE7. Acta Scientiarum. Technology. 41, 1 (maio 2019), e37730. DOI:https://doi.org/10.4025/actascitechnol.v41i1.37730.