BN Cat. gén. 1960-1969
Bibliogr., GB (CD), 1950-1995
Brahms chamber music / Ivor Keys, 1978
Grove music online : Keys, Ivor (Christopher Banfield) - http://www.grovemusic.com
(2006-11-16)
LC authorities : Keys, Ivor Christopher Banfield - http://authorities.loc.gov (2006-11-16)