Klaus Weihrauch, Xizhong Zheng. A Finite Hierarchy of the Recursively Enumerable Real Numbers. In Lubos Brim, Jozef Gruska, Jirí Zlatuska, editors, Mathematical Foundations of Computer Science 1998, 23rd International Symposium, MFCS 98, Brno, Czech Republic, August 24-28, 1998, Proceedings. Volume 1450 of Lecture Notes in Computer Science, pages 798-806, Springer, 1998. [doi]
Abstract is missing.