Gonsalves, Paul, and Duke Ellington. “Interlude Score (Diminuendo and Crescendo in blue): Improvisation by Paul Gonsalves”. Per Musi, no. 29 (June 13, 2014): 1–4. Accessed May 1, 2024. https://periodicos.ufmg.br/index.php/permusi/article/view/39651.