Postal Museum Budapest (Postamúzeum, Budapest)
Postal and Telegraph Museum Belgrade
Térfi, B. (Terfi, B.) 1943: Prefilatelic Letters of Hungary (Bélyeg előtti levelek és azok lebetűzési)
History of Mail, available at: Watson.sk
Szentkláray, J. (Sentklarai, J.) 1898: History of Parishes
Group of authors (1987): 250 Years of Mail in Zrenjanin, Novi Sad: Forum
Višicki, V. (1996): Military Censorship 1876–1945. Philatelist 225/226
Janjetović, Z. (2012): Borders of the German Occupation Zone in Serbia 1941–1944.
Torontál, May 26, 1920: Historical Archive Zrenjanin
Archive of the Catholic Parish Novi Bečej
Legacy of István Sekereš Gellért (Szekeres István Gellért)
Archive of the family of Árpád Jager (Jáger Árpád)
Report from the Annual Assembly of the Philatelists Association Novi Bečej 1972
Report on the Celebration of the 15th Anniversary of the Philatelists Association Novi Bečej
Narratives of Vera Tapavički, Vladimir Papa, Katica Tarabić, and Dušan Josimović
Auction site – darabanth.hu
Collection of letters, postcards, telegrams, and shipping documents from the archive of Károly André (André Károly)
