[2] In 1973–89 Trela-Mazur worked at the WSP Institute of History (Wyższa Szkoła Pedagogiczna) in Opole, and in 1990–2004 at the Akademia Świętokrzyska in Kielce, as well as in Brussels (1998-2003).

[2] Trela-Mazur is the author of a compendium of postwar history of Polish intelligentsia from the eastern territories of Poland (known as Kresy), which were incorporated into the Soviet Union by Joseph Stalin at the end of World War II.

The book, Powojenne losy inteligencjii kresowej (Postwar History of the Kresy Intelligentsia), is a result of conference held in November 2005 in Opole, in which 16 notable writers and academics participated.

Apparently, the most notable paradox of the flight and expulsion of Poles from the Kresy macroregion was the fact that following border shift, the eastern spirit was revived mainly in the westernmost part of new Poland.

Contributing writers included S. Czerkas, J. Duda, E. Dworzak, A. Guzik, A. Hanich, P. Harupa, J. Hickiewicz, A. Hlebowicz, H. Stroński, Stanisław Vincenz, A. Wierciński, A. Wolny, and Elżbieta Trela-Mazur.