I. Jordanov, "Corpus of Byzantine Seals from Bulgaria, Volume 1–3, Sofia, 2003, 2006, 2009. Addenda et Corrigenda (2)", *untranslated* V. Gyuzelev, D. Damyanov, I. Bozhilov, I. Iliev, V. Boneva, Hr. Haritonov , I. Iordanov *untranslated*s.), Balgariya v evropeiskata kultura, nauka, obrazovanie, religiya, vol. 1 (Shumen), Shumen, 2015, p. 223-306.
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