1. BAA, 2001. T5 Agreement (Delivery Team Handbook) BAA plc. London.
2. BAA, 2004. T5 Agreement: We’re making history, booklet produced by T5 Internal Communications Team, April.
3. Modularity in the design of complex engineering systems;Baldwin,2006
4. Where do transactions come from? Modularity, transactions, and the boundaries of firms;Baldwin;Industrial and Corporate Change,2008