(en-US) Ben Ratliff, « George Russell, Composer Whose Theories Sent Jazz in a New Direction, Dies at 86 », The New York Times, (ISSN0362-4331, lire en ligne, consulté le )
(en-US) Ben Ratliff, « George Russell, Composer Whose Theories Sent Jazz in a New Direction, Dies at 86 », The New York Times, (ISSN0362-4331, lire en ligne, consulté le )