- Research Department of the Universal House of Justice, Abdu'l-Bahá, Mírzá Abu’l-Fadl Gulpáygání. Compilation of Extracts Regarding Arius (1991/1996). Collection of materials regarding an early Christian theologian who, in expounding that Christ was subordinate to God the Father, discarded the trinity and fractured the unity of the Church.
- Universal House of Justice. Tablet of 'Abdu'l-Baha Concerning Arius (1998-03-17). Arius was an early Christian theologian whose rejection of the Trinity, Abdu'l-Bahá said, destroyed the unity of the Church.
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