Souza, A. L., Paiva, D. S., Andrade, J. C. S., Silva Junior, A. C., & Goulart, R. C. (2012). The International Carbon Credit Market: A Comparative Study Between the Regulated and Voluntary Markets the Period 2004 to 2011. Sistemas &Amp; Gestão, 7(4), 526–544. https://doi.org/10.7177/sg.2012.V7.N4.A2