Moses Gaster, 1894. The Unknown Aramaic Original of Theodotion's Additions to Daniel in Proceedings of the Society for Biblical Archaeology Vol. xvi. Demonstrating that the existing Aramaic text is itself an adaptation from the Greek of Theodotion, not its original.
Emil Schürer in Herzog-Hauck, Real-Encyclopädie für protestantische Theologie i. 639 (1909)