7[14]Hudson,P.T.W.,Parker,& van der Graaf,G.C.The Hearts and minds programmes:Understandig HSE Culture.Paper SPE 73938 Presented at 2002 SPE Conference on HSE in Oil and Gas Exploration and Production,Kuala Lumpur,2002
8[15]Gerdrd van der Graaf,Robin.Bryden,Volkert Zijlke,Hearts and minds change programmes make a difference,Paper SPE 86589 Presented at 2004 SPE Conference on HSE in Oil and Gas Exploration and Production,Calgary,2004
