希臘的奴隸在被解放後一般都會成為外人。他們成為外國居民,但卻不能成為他們居住地的公民,因此他們獲得的自由並不是完全的自由。 Bradley K. R. 1984, Slavesandmasters in the Roman Empire. Garlan, Y 1988, Slavery in Ancient Greek. Ithaca
Aegean Davis, Robert C. Christian Slaves, Muslim Masters: White Slavery in the Mediterranean, the Barbary Coast and Italy, 1500-1800. Palgrave Macmillan
Band 1984 - Perfect Strangers 1987 - The House of Blue Light 1990 - Slaves & Masters 1993 - The Battle Rages On 1996 - Purpendicular 1998 - Abandon 2003
Davis, Professor Robert. Christian Slaves, Muslim Masters: White Slavery in the Mediterranean, the Barbary Coast and Italy, 1500–1800. Ohio USA: Pangrave