Sekundær litteratur Garber, Marjorie & Vickers, Nancy (2003): , Routledge; 1. utg, ISBN 978-0-415-90099-7. Harrison, Jane Ellen ([1903] 1922): , «The Ker as Gorgon» London, Jack (1914): . ISBN 0-935180-40-0. Smith, William (1873): «Perseus» i: , London. Wilk, Stephen R. (2007): . Oxford University Press. ISBN 978-0-19-534131-7 Walker, Barbara G. (1996): . New Jersey: Castle Books. ISBN 0785807209 .