Everson et autres 2007. (en) Michael Everson, David Birnbaum, Ralph Cleminson, Ivan Derzhanski, Vladislav Dorosh, Alexej Kryukov, Sorin Paliga et Klaas Ruppel, Proposal to encode additional Cyrillic characters in the BMP of the UCS (noN3194R, L2/07-003R), (lire en ligne)
Shardt, Simmons et Andreev 2010. (en) Yuri Shardt, Nikita Simmons et Aleksandr Andreev, Proposal to Encode Some Outstanding Early Cyrillic Characters in Unicode, (lire en ligne)