Operational Research for informed innovation: NHS Direct as a case study in the design, implementation and evaluation of a new public service. - Geoff Royston; J. Halsall; D. Halsall; C. Braithwaite (J. Oper. Res. Soc., 2003)

The DH Accident and Emergency Department model: a national generic model used locally. - A. Fletcher; D. Halsall; S. Huxham; David J. Worthington (J. Oper. Res. Soc., 2007)