[1]
A. Rodríguez Sebastián, “Cumbre y contracumbre Río+20”, Bol. CF+S, no. 52/53, pp. 237–240, Jul. 2014, Accessed: Apr. 21, 2026. [Online]. Available: https://polired.upm.es/index.php/boletincfs/article/view/2772