Accurate 3D Lighthouse Localization of a Low-Power Crystal-Free Single-Chip Mote. Brian G. Kilberg, Felipe M. R. Campos, Filip Maksimovic, Thomas Watteyne, Kristofer S. J. Pister. IEEE/ASME Journal of Microelectromechanical Systems, DOI 10.1109/JMEMS.2020.3011460, pp. 1-7, August 2020. [pdf]