Octet in E flat major op. 20 Octet in E flat major, op.20 Octet in E flat major, Op.20 Septet in E-flat major, op. 20 Septet in E Flat Major Op. 20 Sonata in A flat major op. 26 Sonata in B flat major op. 22 Quartets in B flat major op. 130 Quartett in B flat major op.130 Quartett in E flat major op.127