Ed. H. Carr. International Relations Between the Two World Wars, 1919-1939
(Corpus Fontium Historiae Byzantinae, 42) Ihor Sevcenko (trans.), Theophanis Continuati-Chronographiae Quae Theophanis Continuati Nomine Fertur Liber Quo Vita Basilii Imperatoris.pdf
(CFHB 5) Ioannis Scylitzae. Synopsis Historiarum. Ed. by H. Thurn. Berlin 1973.
D. Nicol. the Last Centuries of Byzantium, 1261-1453.CUP 1993.
Byzanz Und Das Abendland (Eötvös Collegium) Program
Malingoudis, Ph. Zvaiten Bulgarschen Staates