ALO: An ultrasound system for localization and orientation based on angles. - Santiago Elvira Diaz; Angel de Castro; Javier Garrido Salas (Microelectron. J., 2013)

HALO4: Horizontal Angle Localization and Orientation System with 4 Receivers and Based on Ultrasounds. - Santiago Elvira Diaz; Angel de Castro; Javier Garrido Salas (J. Intell. Robotic Syst., 2016)