^Protopsaltis, Demetrios (2012-05-09). An Encyclopedic Chronology of Greece and Its History. Xlibris Corporation. ISBN978-1-4691-4001-8. In the Homeric roll call of the Greek armies and the ships that participated in the Trojan War expedition, the "trusty" Perrhaebi and Enienes are said to have provided forty ships.
^The Oxford Classical Dictionary by Simon Hornblower and Antony Spawforth, 2003, ISBN0-19-860641-9, page 1142, "Perhhaebi , a tribe occupying a district on the northern border of Thessaly and commanding passes from Macedonia. Although most of their country was mountainous and sparsely inhabited their principal towns Olooson the tribal capital and Phalanna were situated in fertile plains. Neither however played any significant role in history. The Perrhaebi who had been thrust northwards by the invading Thessalians were reduced to the status of perioikoi..."