I wouldn't spend too much time looking at Thucydides for that battle unless you wish to discuss what it meant for the Greek states in the long term. It wouldn't be too far a stretch to call Thucydides' work a sequel to Herodotus, as he carries on roughly where Herodotus left off, and even makes a subtle note of his predecessor at the start of the text (stating that he aims to be less biased).

Diodorus Siculus may be somewhere for you to look. He talks about it in his Bibliotheca historica, but he can only be called a secondary source as he wrote a good 400 years later. He is believed to be working from a primary text that we no longer have access to though which makes him of interest, some thinking it is the work of Ephorus of Cyme.

It's not much to go on, but hopefully it's a start!