Similar principles were systematically described for Russian by J. Thomas Shaw in 1969, and since widely adopted. Their application for Ukrainian and multilingual text were described in the 1984 English translation of Kubiiovych's "Encyclopedia of Ukraine" and in the 1997 translation of Hrushevskyi's "History of Ukraine-Rus", and other sources have referred to these, for example, historian Serhii Plokhy in several works. However, the details of usage vary, for example, the authors of the "Historical Dictionary of Ukraine" render the soft sign ь with an "i", "thus Khvyliovy, not Khvylovy, as in the "Encyclopedia of Ukraine"".