Cycles opens a downloadable link to The ‘Giant Steps’ Progression and Cycle Diagrams 12 page pdf by Dan Adler.
Dan started to investigate musical cycles systematically following a master class by the great alto saxophonist Gary Bartz at Michiko Rehearsal Studios in NYC, where he made the statement that all the secrets of Jazz harmonic progressions and substitutions can be deduced from studying cycles.
Jazz Inside Magazine Interview
Here is a link to an Interview with Dan Adler in Jazz Inside Magazine, Guitar Lovers’ Celebration, March 2011.
WikiPedia mentions Dan Adler’s Cycles article (see below) in two entries: Interval Cycles and Coltrane Changes.
JAZZ INSIDE MAGAZINE Articles
The ‘Giant Steps’ Progression and Cycle Diagrams (Appeared in Jazz Improv Magazine Volume 3, No. 3)