• bg: Цар bg:Константин Асен и Царица bg:Ирина Ласкарина Асенина
• de: Zar de:Konstantin Tich Asen und seine Gemahlin Zarin Irina (oder Irene) Laskarina Asenina von de:Nikaia
• en: en:Constantine Tikh of Bulgaria and Eirene of en:Nicaea

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