Fulop, N., Capelas Barbosa, E., Hill, M., Ledger, J., Sherlaw-Johnson, C., Spencer, J., Vindrola-Padros, C., & Morris, S. "Special Measures for Quality and Challenged Providers: Study Protocol for Evaluating the Impact of Improvement Interventions in NHS Trusts", International Journal of Health Policy and Management, 9, 4, 2020, 143-151. doi: 10.15171/ijhpm.2019.100