Concerto N. IV for the piano, op. 58, cop. 1939---port. de la partitura (Ludwig van Beethoven; provided with fingering, and with a complete arrangement, for piano of the orchestral accompaniment by Franz Kullak)

The New Grove Dictionary of Music and Musicians, 2001---(Kullak; (3) Franz Kullak; n. Berlín, 12-4-1844; m. Berlín, 9-12-1913; profesor de piano, hijo de Theodor Kullak; concertista)