| | Square in the Circle - Diminished Scale 4ths
Here's a post with a downloadable exercise
on some of the possible Perfect 4th / Tritone
(or Tritone / P4th) configurations contained in a diminished scale
and how they might be used.
Author of "The Melodic Minor Handbook" (J. Aebersold Books) and "Slick Licks That Stick!" (eBook available in Bass Clef from bobbysternjazz.com).