Mendelssohn, Felix. Symphony No. 4, "The Italian," second movement, 4 before C, F3-G3 trill. Corey, Gerald. To the World's Bassoonists 5/1 (1975): 5.

F3-G3:

o o o | o o o
  a-tr   E-tr

Suggested Heckel bassoon fingerings for musical passages