Hawton, K., Bergen, H., Simkin, S., Wells, C., Kapur, N., & Gunnell, D. (2012). Six-Year Follow-Up of Impact of Co-proxamol Withdrawal in England and Wales on Prescribing and Deaths: Time-Series Study. Public Library of Science.

Hawton, Keith, Helen Bergen, Sue Simkin, Claudia Wells, Navneet Kapur, and David Gunnell. Six-Year Follow-Up of Impact of Co-proxamol Withdrawal in England and Wales On Prescribing and Deaths: Time-Series Study. Public Library of Science, 2012.

Hawton, Keith, et al. Six-Year Follow-Up of Impact of Co-proxamol Withdrawal in England and Wales On Prescribing and Deaths: Time-Series Study. Public Library of Science, 2012.