Wiewiorowski, J. “The Defence of the Long Walls of Thrace (Μακρά Τείχη τῆς Θρᾴκης) under Justinian the Great (527–565 A.D.)”. Studia Ceranea, vol. 2, Dec. 2012, pp. 181-94, doi:10.18778/2084-140X.02.15.