History of the Peloponnesian War
Thucydides
Thucydides, Vol. 1-4. Smith, Charles Foster, translator. London and Cambridge, MA: Heinemann and Harvard University Press, 1919-1923.
Now this Teres, the father of Sitalces, was the first to found the great kingdom of the Odrysians, which extended over the larger part of Thrace;