カール・ヴァン・ベートーヴェン
Magnani, Luigi (1977). Beethoven's Nephew. ISBN 978-0491016889
Sterba, Editha (1954). Beethoven and his nephew: A psychoanalytic study of their relationship. ISBN 978-0-8052028-9-2
Torfs, Ana (1977). Beethoven's Nephew. ISBN 978-2930128115