Arts, Birgitta: Beethoven had access to a pianoforte with a keyboard compass of FF-c’’’’ in 1802. The relationship between the Stein-Streicher family and the composer Ludwig van Beethoven in the early years in Vienna (1796-1803). January 2015.
Arts, Birgitta and Sietse Kok: The impossible note in Beethoven’s Piano Sonata Opus 27 no. 2. June 2015.
Arts, Birgitta and Sietse Kok: The impossible note, part II. Where Beethoven tells us what we do not want to see. February 2016.
Arts, Birgitta: The development of a six octaves fortepiano in Vienna around 1801. Article originally published in the Netherlands EPTA Piano Bulletin, 2016/2. Translated from Dutch, July 2018.