Interpretation of radio metric signal for tumour detectionRiipulk, Jevgeni; Hinrikus, Hiie19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, Oct. 30 - Nov. 2, 1997, Chicago IL USA : Magnificent Milestones and Emerging Opportunities in Medical Engineering : final program & abstract book1997 / p. 165 https://ieeexplore.ieee.org/abstract/document/756838

Measurement of correlation between heart rate and physiological parameters variationsLass, Jaanus; Hinrikus, Hiie; Kaik, Jüri; Meigas, Kalju19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, Oct. 30 - Nov. 2, 1997, Chicago IL USA : Magnificent Milestones and Emerging Opportunities in Medical Engineering : final program & abstract book1997 / p. 63 https://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=754535