@article{1183736430,
author = {Lachlan, A. H.},
title = {Degrees of Recursively Enumerable Sets Which Have No Maximal Supersets},
journal = {J. Symbolic Logic},
volume = {33},
number = {1},
year = {1968},
pages = { 431-443},
language = {en},
url = {http://dml.mathdoc.fr/item/1183736430}
}
Lachlan, A. H. Degrees of Recursively Enumerable Sets Which Have No Maximal Supersets. J. Symbolic Logic, Tome 33 (1968) no. 1, pp. 431-443. http://gdmltest.u-ga.fr/item/1183736430/