J.-P. Himka. Religion and Nationality in Western Ukraine: The Greek Catholic Church and the Ruthenian National Movement in Galicia, 1870-1900. [s.l.]: McGill-Queen's Press - MQUP, 1999. 236 s. Dostupné online. ISBN9780773518124. S. 136. (anglicky)
i-franko.name
Болгарські праці М. Драгоманова [online]. i-franko.name [cit. 2015-11-13]. Dostupné online. (ukrajinsky)