Links for additional reading about Charlie's teaching:
Charlie Banacos: The Zen Master of Jazz Improvisation
http://www.joehubbardbass.com/369/charlie-banacos-zen-master-of-jazz-improvisation/
Charlie Banacos: Recollections Of A Legend
https://www.allaboutjazz.com/charlie-banacos-recollections-of-a-legend-by-mike-brannon.php