John Mack. The Journal of the IDRS 1974: pp. 25-37. https://www.idrs.org/publications/179-the-journal-of-the-idrs-1974/#page27. Tabuteau referenced on pp. 25, 33; reprinted in The Double Reed. Vol. 19, No. 3 (1996): pp. 53-65. https://www.idrs.org/publications/60-the-double-reed-1996-19-3/#page=19. Tabuteau referenced on pp. 53, 61, 63.