GriswoldHarold E. (1988). How to teach aural skills with: electronic tuners. Music Educators Journal, 74 (5), 49–51.
2.
VolkmanR. (1996). Viva la petite difference. Tuba Journal, 23, 40.
3.
GreenE. A. H. (1987). Teaching stringed instruments in classes. Bloomington, IN: Tichenor Publishing.
4.
HenningG. B., GrosbergS. L. (1968). Effects of harmonic components on frequency discrimination. Journal of the Acoustical Society of America, 44 (5), 1386–1389.
5.
TerhardtE. (1975). The influence of intensity on the pitch of complex tones. Acustica, 33, 344–348.
6.
VershureJ., van MeertenA. A. (1975). Effect of intensity on pitch. Acustica, 32, 33–44.
7.
SergeantD.(1973). Measurement of pitch discrimination, Journal of Research in Music Education, 21, 3–19.
8.
BenadeA. H. (1990). Fundamentals of musical acoustics. (2nd ed.). New York: Dover Publications.
9.
AlexanderMichael L.(2000). Comparing the use of pure tone versus complex tones as a reference pitch for tuning the public school string orchestra. (Unpublished Dissertation, Univ. of Houston, 2000).
10.
Ibid.
11.
DalbyB (1999). Teaching audiation in instrumental classes. Music Educators Journal, 85 (6), 22.