OR as technology revisited. - P. Keys (J. Oper. Res. Soc., 1998)

OR groups and the professionalisation of OR. - P. Keys (J. Oper. Res. Soc., 1998)

Part Special Issue Editorial: The process of OR. - P. Keys; Gerald Midgley (J. Oper. Res. Soc., 2002)

On becoming expert in the use of problem structuring methods. - P. Keys (J. Oper. Res. Soc., 2006)