A light measuring system for forest researchPalva, L.; Siivola, E.; Salminen, R.; Kontra, VeliAutomation, simulation & measurement : ASM'91 : 3rd biennal conference, Tallinn, October 7-11, 1991. Section A. Section M / Tallinn Technical University1992 / p. 75-81: ill

Integrated analog front-end for ECG measurementSiren, Harri; Kontra, VeliBEC'96 : the 5th Biennial Baltic Electronics Conference, October 7-11, 1996, Tallinn, Estonia : proceedings1996 / p. 203-204: ill