1. Guttmacher Institute State Policies in Brief: Targeted Regulation of Abortion Providers 2018 https://www.guttmacher.org/state-policy/explore/targeted-regulation-abortion-providers
2. U.S. Court of Appeals for the Fifth Circuit Planned Parenthood of Greater Tex. Surgical Health Servs. v. Abbot
3. Texas Policy Evaluation Project Change in number of physicians providing abortion care in Texas after HB2 2016 https://liberalarts.utexas.edu/txpep/_files/pdf/TxPEP-ResearchBrief-AdmittingPrivileges.pdf
4. U.S. Supreme Court Whole Woman's Health v. Hellerstedt 2016
5. Incidence of emergency department visits and complications after abortion;Upadhyay;Obstet Gynecol,2015