• The effect of static magnetic field on heart rate variability - an experimental studyKoppel, Tarmo; Vilcane, Inese; Carlberg, Michael; Tint, PiiaAgronomy research2015 / p. 765-774 : ill https://alephfiles.rtu.lv/TUA01/000048351_e.pdf https://www.scopus.com/sourceid/21100201050 https://www.scopus.com/record/display.uri?eid=2-s2.0-84937110121&origin=inward&txGid=578ccfa65885fc75c494543050d96308
• The effect of static magnetic field on heart rate variability - an experimental study [Electronic resource]Koppel, Tarmo; Vilcane, Inese; Carlberg, Michael; Tint, Piia6th International Conference Biosystems Engineering 2015 : 7-8 May 2015, Tartu, Estonia : book of abstracts2015 / p. 108. [CD-ROM] http://bse.emu.ee/BSE2015_Book%20of%20ABSTRACTS_ISBN.pdf