Henry R. Immerwahr, Choes and Chytroi, in Transactions and Proceedings of the American Philological Association, vol. 77, 1946, pp. 254-260.
persee.fr
Discussione in Pickard-Cambridge, pp. 21-22; M.H.A.L.H. Van Der Valk, θύραζε κῆρες or Κᾶρες, in Revue des Études Grecques, vol. 76, 1963, pp. 418-420. Arthur Pickard-Cambridge, Le feste drammatiche di Atene, Scandicci (FI), 1996.