@article{1183741549,
author = {Cooper, S. B.},
title = {Partial Degrees and the Density Problem. Part 2: The Enumeration Degrees of the $\sum\_2$ Sets are Dense},
journal = {J. Symbolic Logic},
volume = {49},
number = {1},
year = {1984},
pages = { 503-513},
language = {en},
url = {http://dml.mathdoc.fr/item/1183741549}
}
Cooper, S. B. Partial Degrees and the Density Problem. Part 2: The Enumeration Degrees of the $\sum_2$ Sets are Dense. J. Symbolic Logic, Tome 49 (1984) no. 1, pp. 503-513. http://gdmltest.u-ga.fr/item/1183741549/