Exposure to radiofrequency electromagnetic fields from mobile networking in motor-carsKoppel, Tarmo; Ahonen, MikkoBulgarian journal of public health = Българско списание за обществено здраве2015 / p. 24-30 : ill http://ncphp.government.bg/files/spisanie/BG_JURNAL_2015_2_1.pdf

Exposure to radiofrequency electromagnetic fields from mobile networking in motor-cars [Electronic resource]Koppel, Tarmo; Ahonen, MikkoThe 8th International Workshop on Biological Effects of Electromagnetic Fields : papers2014 / [CD-ROM]