URL الوصول: http://hdl.handle.net/10803/689918
URL الوصول: http://hdl.handle.net/10803/674675
URL الوصول: http://hdl.handle.net/10803/674685
URL الوصول: http://hdl.handle.net/10803/668501
URL الوصول: https://www.raco.cat/index.php/DER/article/view/331014
URL الوصول: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::2686501362f594ae9f4fad8a4c634fffhttps://revistes.ub.edu/index.php/REIRE/article/view/reire2017.10.218069