References in periodicals archive ?
The nude youth holds a tympanon in which his and the maenad's reflection seem to be conflated.
Marianne Maaskant-Kleibrink, "A Glass Gem from the Castra at Nymegen" Bulletin antieke beschaving 43 (1968): 70-74 described a gem with a scantily clad maenad dancing with a tympanon (tambourine/drum).