An Object Locating Method with Uncertainties Applied to an Ultrasonic Multi-Sensor System. - Tapio Heikkilä; Markku Järviluoma; Osmo Voutilainen (J. Robotics Mechatronics, 1993)

Low intrusive Ehealth monitoring: human posture and activity level detection with an intelligent furniture network. - Tapio Heikkilä; Esko Strömmer; Sauli Kivikunnas; Markku Järviluoma; Marko Korkalainen; Vesa Kyllönen; Esa-Matti Sarjanoja; Irina Peltomaa (IEEE Wirel. Commun., 2013)