?url_ver=Z39.88-2004&rft_id=doi%3A10.3390%2Fsu13095112&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Garc%C3%ADa+Villena%2C+Eduardo&rft.aufirst=Eduardo&rft.aulast=Garc%C3%ADa+Villena&rft.volume=13&rft.title=Sustainability&rft.issn=2071-1050&rft.atitle=Instrumentalization+of+a+Model+for+the+Evaluation+of+the+Level+of+Satisfaction+of+Graduates+under+an+E-Learning+Methodology%3A+A+Case+Analysis+Oriented+to+Postgraduate+Studies+in+the+Environmental+Field&rft.date=Mayo+2021&rft.issue=9&rft.pages=5112&rft.genre=article