?url_ver=Z39.88-2004&rft_id=10.1145%2F3307630.3342416&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=Germania+Del+Rocio&rft.au=Rodriguez+Morales%2C+Germania+Del+Rocio&rft.aulast=Rodriguez+Morales&rft.isbn=978-1-4503-6668-7&rft.btitle=SPLC+'19%3A+Proceedings+of+the+23rd+International+Systems+and+Software+Product+Line+Conference&rft.title=Accessibility+variability+model%3A+the+UTPL+MOOC+case+study&rft.date=September+2019&rft.genre=proceeding