ASTYCUS (Ἀστυπάλαια : Vravnitza, or river of Istíb), a river of Paeonia, flowing into the Axius, on which was situated the residence of the Paeonian kings. (Polyaen. Strat. 4.12; Leake, Northern Greece, vol. iii. pp. 464, 475.)
Dictionary of Greek and Roman Geography, illustrated by numerous engravings on wood. William Smith, LLD. London. Walton and Maberly, Upper Gower Street and Ivy Lane, Paternoster Row; John Murray, Albemarle Street. 1854.