?url_ver=Z39.88-2004&rft_id=doi%3A10.3390%2Fijerph18094913&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=L%C3%B3pez-Valverde&rft.aufirst=Paula&rft.au=L%C3%B3pez-Valverde%2C+Paula&rft.date=Mayo+2021&rft.atitle=Instruments+to+Assess+Physical+Activity+in+Primary+Education+Students+with+Autism+Spectrum+Disorder%3A+A+Systematic+Review&rft.pages=4913&rft.issue=9&rft.volume=18&rft.title=International+Journal+of+Environmental+Research+and+Public+Health&rft.issn=1660-4601&rft.genre=article