Maunder, Richard (Februar 1989). «Correspondence: Performing Mozart and Beethoven Concertos». Early Music17 (1): 139–140. ISSN0306-1078. JSTOR3127279.
Kinderman, William (1996). «Reviews of Books: Beethoven Forum, ii (ed. by Christopher Reynolds, with Lewis Lockwood and James Webster)». Music & Letters77 (1): 124–126. ISSN0027-4224. JSTOR732277.
F.W.S. (Juli 1965). «Reviews of Music: Concerto, K. 491». Music & Letters46 (3): 285–286. ISSN0027-4224. JSTOR732277.
worldcat.org
Maunder, Richard (Februar 1989). «Correspondence: Performing Mozart and Beethoven Concertos». Early Music17 (1): 139–140. ISSN0306-1078. JSTOR3127279.
Kinderman, William (1996). «Reviews of Books: Beethoven Forum, ii (ed. by Christopher Reynolds, with Lewis Lockwood and James Webster)». Music & Letters77 (1): 124–126. ISSN0027-4224. JSTOR732277.
F.W.S. (Juli 1965). «Reviews of Music: Concerto, K. 491». Music & Letters46 (3): 285–286. ISSN0027-4224. JSTOR732277.