1. Validity of exposure data obtained by questionnaire. Two examples from occupational reproductive studies;Ahlborg;Scand J Work Environ Health,1990
2. Berg G, Breckenkamp J, Kowall B, Schlehofer B, Wahrendorf J, Blettner M, Schüz J, Schmiedel S, Potthof P, Reis U. 2006. Cross sectional study to record and evaluate possible adverse health effects due to electromagnetic fields from cell-phone base stations-Second interim report Bielefeld, Heidelberg, Mainz, Munich (Germany).
3. X2001-Exposure Assessment in Epidemiology and Practice;Bergqvist;Exposure to radiofrequency fields and mobile telephony. Arbeite Och Hälsa,2001
4. The Freiburg Complaint Checklist;Fahrenberg;Zeitschrift für Klinische Psychologie, Forschung und Praxis,1975
5. The Freiburg Complaint Checklist. Form FBL-G and revised form FBL-R;Hiller;Zeitschrift für klinische Psychologie,1997