Giuliani L, Soffritti M: Non-thermal effects and mechanisms of interaction between electromagnetic fields and living matter. Mattioli 1885: 273-300; ISBN 978-88-6261-166-4
1997,
Hayes DL, Wang PJ, Reynolds DW, Estes 3rd M, Griffith JL, Steffens RA, Carlo GL, Findlay GK, Johnson CM