Eberhard Herrmann. Definable Structures in the Lattice of Recursively Enumerable Sets. Journal of Symbolic Logic, 49(4):1190-1197, 1984.
@article{Herrmann84,
title = {Definable Structures in the Lattice of Recursively Enumerable Sets},
author = {Eberhard Herrmann},
year = {1984},
researchr = {https://researchr.org/publication/Herrmann84},
cites = {0},
citedby = {0},
journal = {Journal of Symbolic Logic},
volume = {49},
number = {4},
pages = {1190-1197},
}