Bb4-C5. Ewell, Terry B. (20 August 1994).
Eb x x tr |(x) x o F a c#
Bb4-C5. de Gomar, Juan. In Apfelstadt, Marc and Klimko, Ronald. Bassoon Performance Practice, Teaching Materials, Techniques and Methods. Idaho: University of Idaho, 1993, p. 55.
Eb Eb x x o | x x o F x o o | x x o F c c
Bb4-C5. Houser, Roy. In Klimko, Ronald. Bassoon Performance Practices and Teaching in the United States and Canada. Idaho: University of Idaho, 1974, p. 64.
x x x | x x x F x x o | x x o F d Bb d Bb
Bb4-C5. Timm, Everett LeRoy. The Woodwinds; Performance and Instructional Techniques. Boston: Allyn and Bacon, 1964, p. 177.
Eb x tr tr | tr tr tr F a c#
"Release A and C# after start of trill, then shift left thumb to C key":
Eb Eb x x x | x x o F x tr tr | x x o F a c# c
Heckel-System (German) Bassoon Trills and Shakes by Note Names