A BiCMOS ultrasound front end signal processor for high temperature applications. - Ovidiu Vermesan; Lars-Cyril Julin Blystad; Roy Bahr; Magnus Hjelstuen; Lionel Beneteau; Benoit Froelich (ESSCIRC, 2005)

A mixed-signal BiCMOS front-end signal processor for high-temperature applications. - Ovidiu Vermesan; Lars-Cyril Julin Blystad; Roy Bahr; Magnus Hjelstuen; Lionel Beneteau; Benoit Froelich (IEEE J. Solid State Circuits, 2006)

Active magnetic ranging while drilling: A down-hole surroundings mapping. - Karsten Husby; Arild Saasen; Jan David Ytrehus; Magnus Hjelstuen; Tor Jan Eriksen; Alessandro Liberale (SAS, 2022)