1. Alexander, C.: A Timeless Way of Building. Oxford University Press, New York (1979)
2. Brand, S.: How Buildings Learn. Viking, New York (1994)
3. Lecture Notes in Computer Science;B. Brumitt,2000
4. Crabtree, A.: Designing Collaborative Systems: A Practical Guide to Ethnography. Springer, Heidelberg (2003)
5. Crabtree, A., et al.: Sore legs and naked bottoms. In: Crabtree, A., et al. (eds.) Proc. of Dependability of Computer-based Systems. The Royal Statistical Society, London (2002)