Bb+2. Bartolozzi, Bruno. New Sounds for Woodwind. London: Oxford University Press, 1971, p. 31.
x x x | x x o Ab w Bb
Bb+2. Reinhard, Johnny. "The Microtonal Bassoon." The Double Reed 10/2 (Fall 1987): 42.
x x x | x x o F Ab w Bb
Bb+2. Vigder, Scott. "A Table of Quarter-Tone Fingerings for the Bassoon," TheDouble Reed 4/2 (October 1981): 44. These fingerings were extracted from Sergio Penazzi'sMetodo per Fagotto (Edizoni Suvini Zerboni-Milano, 1971).
x x x | x x o Ab Bb Bb B(C D?)
Fingerings for microtones