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- ^ {{cite book|last=Becker |first=Claus|last2=Shy |first2=Marlon |last3=Orlando |first3=Vincenzo |last4=Elder |first4=Irene|date=1992 |title=Museum der Erotischen Kunst|location=Munich |publisher=Wilhelm Heyne}
- ^ {{cite book |author=Claus Becker|date=1992 |title=Museum der Erotischen Kunst|location=Munich |publisher=Wilhelm Heyne}
- ^ Claus Becker (1998). Museum der Erotischen Kunst. Wilhelm Heyne.
- ^ Claus Becker (1992). Looking at Lovemaking Constructions of Sexuality in Roman Art, 100 B.C. – A.D. 250. University of California Press. ISBN 9780520229044.