Thorburn, John E.: The Facts on File Companion to Classical Drama, s. 23. Companion to Literature. Facts on File library of world literature. Infobase Publishing, 2005. ISBN 9780816074983. Teoksen verkkoversio.
Austin, Norman: Sophocles' Philoctetes and the Great Soul Robbery, s. 25. Wisconsin Studies in Classics. University of Wisconsin Press, 2011. ISBN 9780299282738. Teoksen verkkoversio.
Sourvinou-Inwood, Christiane: Tragedy and Athenian Religion, s. 18. Greek studies: interdisciplinary approaches. Lexington Books, 2003. ISBN 9780739104002. Teoksen verkkoversio.
tufts.edu
perseus.tufts.edu
Smith, William: ”Agathon”, Dictionary of Greek and Roman Biography and Mythology. Boston: Little, Brown and Company, 1849–1867. Teoksen verkkoversio. (englanniksi)(englanniksi)