1. B. Brown (1973 ): Crime against women alone. A system analysis of the Memphis Police Department's Sex Crime Squads. Rape Investigation1973 .
2. G. Hildebrandt, W. Amelung, and A. Evers (1962 ): Biologische Rythmen und ihre beteudung fur die Badereine klimaheilkunde . In: ). p730 . F. K. Shattaeur Verlag, Stuttgart.