Werfel, Justin, Yaneer Bar-Yam, and Radhika Nagpal. 2005. “Building Patterned Structures With Robot Swarms”. In Intl. Joint Conference on Artificial Intelligence (IJCAI ’05). Referenced from ssr.seas.harvard.edu: Building Patterned Structures with Robot Swarms.

Werfel, Justin, Yaneer Bar-Yam, Daniela Rus, and and Radhika Nagpal. 2006. “Distributed Construction by Mobile Robots With Enhanced Building Blocks”. In IEEE International Conference on Robotics and Automation (ICRA). Referenced from ssr.seas.harvard.edu: Distributed Construction by Mobile Robots with Enhanced Building Blocks.