Steven C. Hause, William S. Maltby (2004). Western civilization: a history of European society. Thomson Wadsworth. p. 76. ISBN978-0-534-62164-3. «The Greco-Macedonian Elite. Los seléucidas respetaban las sensibilidades culturales y religiosas de sus súbditos, pero preferían confiar en los soldados y administradores griegos y macedonios para los asuntos de gobierno del día a día. La población griega de las ciudades, reforzada desde el siglo II a. C. por inmigración desde Grecia, formaba una dominante, aunque no especialmente cohesionada élite.»
Glubb, John Bagot (1967). Syria, Lebanon, Jordan. Thames & Hudson. p. 34. OCLC585939. «In addition to the court and the army, Syrian cities were full of Greek businessmen, many of them pure Greeks from Greece. The senior posts in the civil service were also held by Greeks. Although the Ptolemies and the Seleucids were perpetual rivals, both dynasties were Greek and ruled by means of Greek officials and Greek soldiers. Both governments made great efforts to attract immigrants from Greece, thereby adding yet another racial element to the population.»