Alexiou, A, Kostarakis, P, Christofilakis, VN, Zervos, T, Alexandridis, AA, Dangakis, K, Soras, C and Petrovi'c, VV and Kolundvzija, BM, Interaction between GSM handset helical antenna and user's head: Theoretical analysis and experimental results, In Environmentalist, Kluwer Academic Publishers, volume 25, (Pages: 215–221), 2005.