Ukrepitelnata sistema na provint︠s︡ii︠a︡ Skitii︠a︡ (krai︠a︡ na III-VII v.)
By: Sergeĭ Torbatov
Publisher: Faber
Published: 2002
Place of publication: Veliko Tŭrnovo
Language: bul
Number of pages: 536
Subjects: Fortification; Roman Fortification; Roman Antiquities
Notes: Includes bibliographical references (p. 464-518).

In Bulgarian with summary in English.