See for ephors our study: STRECHIE, Mădălina, “Ephors, the key institution of Sparta”, pp. 203-209, in the volume Law and institutions in the Greco-Roman world: In honorem Teodor Sâmbrian, Volume of the International Colloquium reception of Greco-Latin Antiquity in European cultures, XII edition, May 28, 2021, Craiova, Romania, Craiova, Universitaria Publishing House, 2021, 364 pages, volume coordinated by: Mădălina STRECHIE, Elena-Veronica NICOLA, ISBN: 978-606-14-1773-5.
Thucydides, The Peloponnesian War, Introductory study, translation, notes, index: Prof.univ.dr. docent N. I. Barbu, Bucharest, Scientific Publishing House, 1966, p. 147.
Sarah Pomeroy, Stanley M. Burstein, Walter Donlan, Tolbert Roberts, A brief History of Ancient Greece. Politics, Society and Culture, New York, Oxford, Oxford University Press, 2004, p. 202.
J. B. Bury, Russell Meiggs, History of Greece, Revised Fourth Edition, translated by Diana Stanciu, Bucharest, Bic All Publishing House, 2006, pp. 257-281.