Boyd, P. A., Armstrong, B., Dolk, H., Botting, B., Pattenden, S., Abramsky, L., . . . Wellesley, D. (2005). Congenital anomaly surveillance in England—ascertainment deficiencies in the national system. BMJ Publishing Group Ltd.

Boyd, P A., B. Armstrong, H. Dolk, B. Botting, S. Pattenden, L. Abramsky, J. Rankin, M. Vrijheid, und D. Wellesley. Congenital Anomaly Surveillance in England—ascertainment Deficiencies in the National System. BMJ Publishing Group Ltd, 2005.

Boyd, P A., et al. Congenital Anomaly Surveillance in England—ascertainment Deficiencies in the National System. BMJ Publishing Group Ltd, 2005.