東方問題
Roider's academic specialization is in the study of the Balkans. His books include "The Reluctant Ally: Austria's Policy in the Austro-Turkish War, 1737-1739" (1972), "Austria's Eastern Question, 1700-1790" (1982), "Baron Thugut and Austria's Response to the French Revolution" (1987), and a biography of Maria Theresa of Austria.