X + YY: Formel des Bösen
- साल: 1970
- देश: Germany
- शैली: Crime, Thriller
- स्टूडियो: Brünnstein-Film
- कीवर्ड: exploitation, playboy, serial killer, hormones
- निदेशक: Pavle Jovic, Teja Piegeler
- कास्ट: Ljubiša Samardžić, Kai Fischer, Miloje 'Mića' Orlović, Albert Hehn, Leonina Pavlović, Stefan Zessner
