Valencia Gutiérrez, Adolfo, and Raúl Jesús Vergara Moncada. “PROPOSALS TO IMPLEMENTATION OF ENVIRONMENTAL TAXES IN THE TRIBUTARY SYSTEM, AIMED AT ASSIST IN THE PRESERVATION OF THE ENVIRONMENT IN PERU”. Quipukamayoc, vol. 17, no. 34, Dec. 2010, pp. 87-103, https://doi.org/10.15381/quipu.v17i34.4721.