title: Ioannes Doukas (Ignatios Monk), Caesar: to the question about contacts with South-Eastern and North-Eastern Black Sea region in the 70s – 80s of 11th c.
abstract: Иоанн Дука (Игнатий монах), кесарь: к вопросу о контактах с Юго-Восточным и Северо-Восточным Причерноморьем в 70–80-е гг. XI в. - Institutional repository of Federal State Autonomous Educational Institution of Higher Professional Education Ural Federal University named after the first President of Russia B.N.Yeltsin
journal: Античная древность и средние века