1. Lawsuit agreement to force schools to provide physical education;Adams, J.M.,2015
2. State laws governing school physical education in relation to attendance and physical activity among students in the USA: A systematic review and meta-analysis;An, R.,2021
3. Bias, prevalence and kappa;Byrt, T.,1993
4. Superior Court of California, County of San Francisco,2014
5. California Assembly Bill 1391. (2015). http://www.leginfo.ca.gov/pub/15-16/bill/asm/ab_1351-1400/ab_1391_bill_20150911_enrolled.html