LOSNUS: An ultrasonic system enabling high accuracy and secure TDoA locating of numerous devices. - Herbert Schweinzer; Mohammad Syafrudin (IPIN, 2010)

A Self-Contained and Self-Checking LPS with High Accuracy. - Christian Walter; Mohammad Syafrudin; Herbert Schweinzer (ISPRS Int. J. Geo Inf., 2013)

Robust locating using LPS LOSNUS under NLOS conditions. - Mohammad Syafrudin; Christian Walter; Herbert F. Schweinzer (IPIN, 2014)