F#+3. Bartolozzi, Bruno. New Sounds for Woodwind. London: Oxford University Press, 1971, p. 31.

  Eb Db
x x x | x x x 
   w        F#

F#+3. Reinhard, Johnny. "The Microtonal Bassoon." The Double Reed 10/2 (Fall 1987): 42.

    Eb        F#
x x x | x x x F
            F#

F#+3. Vigder, Scott. "A Table of Quarter-Tone Fingerings for the Bassoon," The Double Reed 4/2 (October 1981): 44. These fingerings were extracted from Sergio Penazzi's Metodo per Fagotto (Edizoni Suvini Zerboni-Milano, 1971).

              F#
/ x x | x x x F
            F#
   D

Fingerings for microtones