Grayson, DavidMcLaren, MelodySpitzeck, Heiko2011-02-082011-02-082011-01David Grayson, Melody McLaren and Heiko Spitzeck, Social intrapreneurs - an extra force for sustainability, Doughty Centre for Corporate Responsibility at the Cranfield School of Managementhttp://dspace.lib.cranfield.ac.uk/handle/1826/4896enWorking Paper