Förtsch, Johann Philipp
Aria «Was sind doch die flüchtigen Freuden» Cant Violadagamb: Solo:, for soprano, viola da gamba and basso continuo
in
Cain und Abel (Der Verzweifelte Brudermörder)
Hamburg
D-Hs ND VI 1023 (34) (excerpt; incomplete, viol part missing)
Susanne Herre, The Viola da gamba in German Baroque Opera: New findings and a closer examination of Pietro Torri's works, Den Haag, thesis, 2015