Octet for strings in E flat majou op. 20 Dctet for strings in E flat major, op.20 Octet for String in E flat major, op.20 Octet in E flat major op. 20 Quartet for Saxophones in B flat major,op.109 Divertimento for strings in B flat major KV137(125b) Divertimento for strings in B flat major KV137(125b); Octet in E flat major, op.20 Serenade for strings in C major op.48 Serenade for strings in E major, op.22