Varick L. Erickson, Miguel Á. Carreira-Perpiñán, Alberto Cerpa. OBSERVE: Occupancy-based system for efficient reduction of HVAC energy. In Xenofon D. Koutsoukos, Koen Langendoen, Gregory J. Pottie, Vijay Raghunathan, editors, Proceedings of the 10th International Conference on Information Processing in Sensor Networks, IPSN 2011, April 12-14, 2011, Chicago, IL, USA. pages 258-269, IEEE, 2011. [doi]