Izvori:
Serial Napper podcast
https://websleuths.com/threads/germany-frauke-liebs-21-paderborn-20-june-2006.433518/
https://www.sueddeutsche.de/panorama/hoexter-chronologie-1.4157391
https://grokipedia.com/page/Murder_of_Frauke_Liebs
https://medium.com/@nikyoung/seven-days-then-silence-7659cbd3b0a2
https://christian-hardinghaus.de/en/frauke-liebs-case/