• Reducing exposure to extremely low frequency electromagnetic fields from portable computersKoppel, Tarmo; Tint, PiiaAgronomy research2014 / p. 863-874 : ill https://www.cabidigitallibrary.org/doi/pdf/10.5555/20143202524 https://www.scopus.com/sourceid/21100201050 https://www.scopus.com/record/display.uri?eid=2-s2.0-84901470463&origin=inward&txGid=44ac140534252915c42c088e3d44da09