“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 Nov. 23];11(3):1-12. Available from: https://eaapublishing.org/journals/index.php/technorev/article/view/523