A hierarchy of Turing degrees of divergence bounded computable real numbers.

Robert Rettinger Xizhong Zheng A hierarchy of Turing degrees of divergence bounded computable real numbers. 818-826 2006 22 J. Complexity 6 http://dx.doi.org/10.1016/j.jco.2006.04.009 db/journals/jc/jc22.html#RettingerZ06