Before switching to fifths tuning, Kress used other tunings on the banjo and tenor guitar.[6] His fifths-tuning gave Kress's playing "fuller chords and basslines", according to Richard Lieberson.Lieberson (1996, p. 42) When Kress's duets with Dick McDonough were published, they were transposed from his fifths tuning to standard tuning.[7]
^ abcYanow, Scott (2013). The Great Jazz Guitarists. San Francisco: Backbeat. pp. 113–114. ISBN 978-1-61713-023-6.
^"Helen Kress". Seacoast Online. 6 March 2011. Retrieved 9 August 2017.
^Lucas & Obrecht (1996, p. 12):
Lucas, Nick; Obrecht, Jas (1996). "Nick Lucas". In Sallis, James (ed.). The Guitar in Jazz: An Anthology. Lincoln, Nebraska: University of Nebraska Press. pp. 12–19. ISBN 978-0-8032-4250-0.
^ abLieberson (1996, p. 47):
Lieberson, Richard (1996). "The jazz guitar duet: A fifty year history". In Sallis, James (ed.). The Guitar in Jazz: An Anthology. Lincoln, Nebraska: University of Nebraska Press. pp. 45–53. ISBN 978-0-8032-4250-0.
^ abLieberson (1996a, p. 92):
Lieberson, Richard (1996a). "Swing Guitar: The Acoustic Chordal Style". In Sallis, James (ed.). The Guitar in Jazz: An Anthology. Lincoln, Nebraska: University of Nebraska Press. pp. 89–112. ISBN 978-0-8032-4250-0.
^Sethares, Bill (2001). "Regular Tunings". Alternate Tuning Guide(.pdf). Madison, Wisconsin: University of Wisconsin Department of Electrical Engineering. pp. 52–67. Retrieved 19 May 2012.