Guallasamin Constante, K., and D. Simón-Baile. “Carbon Footprint of the Cultivation of Roses in Ecuador Comparing Two Methodologies: GHG Protocol Vs. PAS 2050”. Letras Verdes. Revista Latinoamericana De Estudios Socioambientales, no. 24, Sept. 2018, pp. 27-56, doi:10.17141/letrasverdes.24.2018.3091.