Rational Thaumaturgy: Formal Variegation and the Formalization of Event Groups in the Music of Jean Barraqué, Francisco Guerrero Marín, Trevor Bača, and Gregory Rowland Evans
A high-resolution copy of the pdf can be found at: https://drive.google.com/file/d/1R43ACsKq2x1rgbacu0TkXW5evw3Nul0f/view?usp=sharing