Citation:
Flier MS. The Rule of Nine: Ukrainian and Belarusian Orthographic Principles in Historical Perspective Koropecky R, Koznarsky T, Tarnawsky M. Harvard Ukrainian Studies, Znyva: Essays Presented in Honor of George G. Grabowicz on His Seventieth Birthday, Harvard Ukrainian Studies. 2015; 32-33 (1) :223-34.
See also: Michael S. Flier