Woodard, Roger D. (1997). Greek writing from Knossos to Homer: a linguistic interpretation of the origin of the Greek alphabet and the continuity of ancient Greek literacy. Oxford: Oxford University Press. pp. 177–179.
Foat, F. W. G. (1906). "Fresh evidence for Ͳ[Sampi]". Journal of Hellenic Studies 26: 286–287.
Soldati, Agostino (2006). "Τὸ καλούμενον παρακύϊσμα: Le forme del sampi nei papiri". Archiv für Papyrusforschung 52: 209–217.