Planning for disaster: developing a multi-agency counselling service. - W. J. Gregory; Gerald Midgley (J. Oper. Res. Soc., 2000)

Systemic evaluation: a participative, multi-method approach. - Alan Boyd; T. Geerling; W. J. Gregory; Carolyn Kagan; Gerald Midgley; P. Murray; M. P. Walsh (J. Oper. Res. Soc., 2007)