?url_ver=Z39.88-2004&rft_id=doi%3A10.3390%2Fsu13010343&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Betancourt-Odio%2C+Manuel+Alejandro&rft.aulast=Betancourt-Odio&rft.aufirst=Manuel+Alejandro&rft.date=Enero+2021&rft.atitle=Self-Perceptions+on+Digital+Competences+for+M-Learning+and+Education+Sustainability%3A+A+Study+with+Teachers+from+Different+Countries&rft.pages=343&rft.issue=1&rft.volume=13&rft.title=Sustainability&rft.issn=2071-1050&rft.genre=article