Activities: Abstractions for Collective Behavior. - Bent Bruun Kristensen; Daniel C. M. May (ECOOP, 1996)

Supporting complexity through (informational and physical) collaboration and modeling. - Daniel C. M. May; Bent Bruun Kristensen; Palle Nowack (ISICT, 2003)

Collaboration and Modeling in Ambient Systems: Vision, Concepts and Experiments. - Bent Bruun Kristensen; Daniel C. M. May; Palle Nowack (HICSS, 2011)