@inproceedings{RettingerZheng2006, author = {Robert Rettinger and Xizhong Zheng}, title = {Solovay reducibility on d-c.e. real numbers}, booktitle = {Computing and combinatorics, 11th annual international conference, COCOON 2005, Kunming, China, August 16 - 29, 2005}, editor = {Lusheng Wang}, pages = {359 -- 368}, year = {2006}, }