A Guide to Engrave Polytempo Music
Evgeni Kostitsyn. Macondo Swing, Page 66.

written by Nicolás Di Paolo

Guido of Arezzo (991/992 - (17 May?) 1050) was a music theorist of the Medieval era. He is regarded as the inventor of modern musical notation (staff notation) that replaced neumatic notation:

Evgeni Kostitsyn invented notation of polytempo music in the XX century. "A Guide to Engrave Polytempo Music"(24 pages) explains how to engrave page 66 of "Macondo Swing"ballet by Evgeni Kostitsyn.