L. L. Constantine, Human Activity Modeling: Toward A Pragmatic Integration of Activity Theory and Usage-Centered Design, Human-Centered Software Engineering II. NY, 2008.
DOI : 10.1007/978-1-84800-907-3_3

L. L. Constantine, Beyond User-Centered Design and User Experience, Cutter IT Journal, vol.17, issue.2, 2004.

L. L. Constantine and H. Windl, Usage-Centered Design: Scalability and Integration with Software Engineering Human-Computer Interaction: Theory and Practice, Proceedings of the 10th International Conference on Human- Computer Interaction, pp.22-27, 2003.

L. L. Constantine and L. A. Lockwood, Usage-centered engineering for Web applications, IEEE Software, vol.19, issue.2, pp.42-50, 2002.
DOI : 10.1109/52.991331