@article{1183744803,
author = {Downey, Rod and Shore, Richard A.},
title = {Degree Theoretic Definitions of the Low$\_2$ Recursively Enumerable sets},
journal = {J. Symbolic Logic},
volume = {60},
number = {1},
year = {1995},
pages = { 727-756},
language = {en},
url = {http://dml.mathdoc.fr/item/1183744803}
}
Downey, Rod; Shore, Richard A. Degree Theoretic Definitions of the Low$_2$ Recursively Enumerable sets. J. Symbolic Logic, Tome 60 (1995) no. 1, pp. 727-756. http://gdmltest.u-ga.fr/item/1183744803/