Piano Concerto No. 2 (Hummel)
Johann Nepomuk Hummel's Piano Concerto No. 2 in A minor, Op. 85 was written in 1816 and published in Vienna in 1821. Unlike his earlier piano concerti, which closely followed the model of Mozart's, the A minor concerto, like the B minor Concerto, Op. 89, is written in a proto-Romantic style that anticipates the later stylistic developments of composers such as Frédéric Chopin and Felix Mendelssohn.
Date of composition and scoring 
The piano concerto was written by Hummel as a showcase for his virtuosity at the instrument. It was written in 1816 and is scored for piano, flute, two oboes, 2 clarinets, 2 bassoons, 2 horns, 2 trumpets, timpani, and strings.
The work is composed in traditional three movement form. There is a solo transition in the second movement leading into the Rondo without pause.
- Mikio Tao, Works Catalogue of Hummel,  (pdf)
- MF Humphries, The Piano Concertos of Johann Nepomuk Hummel Dissertation (Northwestern University, 1957)
- M.F. Humphries, The Piano Concertos of Johann Nepomuk Hummel, PhD Dissertation (Northwestern University, 1957)
- B.H. Kim, Johann Nepomuk Hummel and His Contribution to Piano Music and the Art of Playing the Piano (University of Rochester, 1967)