Dctet for strings in E flat major, op.20 Octet for String in E flat major, op.20 Octet for strings in E flat majou op. 20 Octet in E flat major, op.20 Octet in E flat major, Op.20 Octet in E flat major op. 20 Serenade for strings in E major, op.22 String Trio in E flat major, op. 3 Symphony in B flat major, op.20 Fugue for string quintet in D major op.137