Population trends in Kosice in the 19th century, Part II. (archival sources and statistical documents)
An impact of political changes upon ethnic identity of Hungarian population in the region of southern Slovakia after 1918
The historical and memoir literature on the history of secondary and vocational schools in Kosice in the interwar period.
Šafárik Czechoslovak state real high school in Prešov in 1919 – 1939.
The Hungarian minority parties in Slovakia in the 1930s in the archive documents.
The Process of annexation of northern Orava to Poland in 1938.
The introduction of the Ukrainian language in 1952.
Ukraine in the foreign policy of the Czech Republic during the formation of bilateral interstate cooperation.
Reviews and anotations
PETRÁŠ, René. Cizinci ve vlastní zemi. Dějiny a současnost národnostního napětí v Evropě. Praha : Auditorium, 2012. 256 s. ISBN 978-80-872-8432-2
REINISCH, Jessica – WHITE, Elizabeth (Eds.). The disentanglement of populations: migration, expulsion and displacement in postwar Europe 1944-9. Chippenham : Palgrave Macmillan, 380 s. ISBN 978-02-3022-204-5
Report from the International Scientific Conference “Transformation of Central European Cities in Historical Development” Krakov, Juny 20th – 21st, 2013
Report from the International Scientific Conference “The Minority Politics in Czechoslovakia in 1960s” Košice, September 11, 2013
Report from the Scientific Conference “East Slovakia in Slovak National History” Košice, July 4th, 2013
Defended Dissertation Thesis