Saponov, Mikhail A. 1978. Menzural' naya ritmika i ea apogee v tvorchestve Guillauma de Machaut' (Mensural rhythm and its apogee in the works of Guillaume de Machaut). Problemy muzykal' nogo ritma (Problems in musical rhythm: in Russian), edited by Mikhail A Saponov,  Moscow: Muzyka.