How can I find musicologists' analyses that focuses on a single piece? I know they're probably pay-walled. Google Scholar yields nothing for Xenakis's Metastasis (1957).
To wit, I'm seeking articles for Xenakis's compositions like
Alegant, Brian. “A Model for the Pitch Structure of Webern's Op. 23 No. 1, ‘Das Dunkle Herz.’” Music Theory Spectrum, vol. 13, no. 2, 1991, pp. 127–146. JSTOR, www.jstor.org/stable/745895.
Alegant, Brian. “Unveiling Schoenberg's Op. 33b.” Music Theory Spectrum, vol. 18, no. 2, 1996, pp. 143–166. JSTOR, www.jstor.org/stable/746022.
Ilias Chrissochoidis, C Mitsakis, S Houliaras. Set theory in Xenakis' EONTA.