^Rome's Enemies (1): Germanics and Dacians (Men at Arms Series, 129) by Peter Wilcox and Gerry Embleton,1982,page 20,"... people, as were the Phrygians and those Thracians living north ... the solid crest of a 'Phrygian'-type helmet as a running pattern, as shown on the pedestal reliefs; ..."
^The Army of Alexander the Great (Men at Arms Series, 148) by Nicholas Sekunda and Angus McBride,1992,page 6,"... Philip gave them heavy armour-cuirasses and helmets of the `Phrygian' type-and he further developed the new tactical formations of Jason of Pherai ..."
Daftar pustaka
Anderson, J.K, (1961) Ancient Greek Horsemanship, Berkeley and Los Angeles.
Connolly, P. (1981) Greece and Rome at War. Macdonald Phoebus, London. ISBN1-85367-303-X