Ubieto Artur A-P. “4R” sustainability and quality teaching using Free Software: Teaching experience in the "Degree in Information and Documentation" of the University of Zaragoza ((1992-)2008-2022). revtechno [Internet]. 2022 Nov. 23 [cited 2024 Sep. 21];11(3):1-12. Available from: https://ojs.bdtopten.com/33015.eaapublishing/index.php/technorev/article/view/523