Tradition
St. Jerome
De Viris Illustribus (Illustrious Men)
Chapter 94
Asterius, a philosopher of the Arian party, wrote, during the reign of Constantius, commentaries On the Epistle to the Romans, On the Gospels and On the Psalms, also many other works which are diligently read by those of his party.
Source: De Viris Illustribus (Illustrious Men) (New Advent)