1. von Arnim, H. (1903-1905), Stoicorum Veterum Fragmenta [= svf], 4 vols., Stutgardiæ, in ædibus B. G. Teubneri.
2. Beekes, R. (2010), Etymological Dictionary of Greek, 2 vols., Leiden, Brill (Leiden Indo-European Etymological Dictionary Series).
3. Collete, B. (2022), The Stoic Doctrine of Providence. A Study of its Development and of Some of its Major Issues, London-New York, Routledge (Issues in Ancient Philosophy).
4. Chantraine, P. (1968, 1970, 1974), Dictionnaire étymologique de la langue grecque. Histoire de mots, 3 vols., Paris, Éditions Klincksieck.
5. Cramer, J.A. (1839), Anecdota Græca e codd. manuscriptis Bibliothecæ Regiæ Parisiensis, vol. 2, Oxonii, e typographeo academico.