Etude in B-flat minor op. 8-11 Etude in B-flat minor, op. 8 No. 11 Etude in B flat minor,Op.8 No.11 Etude in D-sharp minor op.8-12 Etude in C-sharp minor op. 25-7 Etude in E flat minor op.10 no.6 Prelude in B-flat minor op.32, no.2 Etude in A flat major op.25 no.1 Prelude in B-flat minor op Etude in D sharp minor op. 8 no 12