L'estro Armonico op. 3 ("Harmonic Inspiration" in Italian) is a collection of twelve concertos for 1, 2 and 4 violins written by Antonio Vivaldi in 1711. It largely augmented the reputation of Vivaldi as Il Prete Rosso; (The Red Priest). The collections were mostly put together in a chronological order. Op.3 No.8 in A minor is scored for 2 Solo Violins and String Orchestra
Vivaldi, Antonio. L'Estro Armonico. Opus 3, Nr. 6. Konzert in A Minor for violin, strings and bass. Edition for Violin and Piano. Edition Butorac, Munchen.