Quartet in C sharp minor op. 131 Quartet in C sharp minor,op.131 Quartett in C sharp minor op.131 1-7. Quartet in C sharp minor op. 131 5-11. Quartet in C sharp minor, op. 131 string quartet in c sharp minor,op.131 Sonata in F sharp minor op. 10 String Quartet in C Sharp Minor Op. 131 String Quartet in F sharp minor, op.121 Scherzo in C sharp minor op. 39