Investigating ultrasonic positioning on mobile phones. - Viacheslav Filonenko; Charlie Cullen; James D. Carswell (IPIN, 2010)

Asynchronous Ultrasonic Trilateration for Indoor Positioning of Mobile Phones. - Viacheslav Filonenko; Charlie Cullen; James D. Carswell (W2GIS, 2012)

Indoor Positioning for Smartphones Using Asynchronous Ultrasound Trilateration. - Viacheslav Filonenko; Charlie Cullen; James D. Carswell (ISPRS Int. J. Geo Inf., 2013)