 Korolkova's best-known work is probably the PT Fonts project, a partly open-source project commissioned by the Russian Ministry of Communications as a single family able to support all the common variations of the Cyrillic script.Korolkova works for the company ParaType and studied at the Moscow State University of Printing Arts.She is the author of the book "Living Typography" () and has also given lectures on Cyrillic letter structure.