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4. Eduteka, http://www.eduteka.org/MatrizValoracion.php3 http://www.eduteka.org/MatrizValoracion.php3
5. Electronic Engineering Degree at UPV/EHU, http://www.zientzia-teknologia.ehu.es/p240content/es/contenidos/enlace/ztf_fct_titulaciones/es_indice/grados.html#ie.