@article{GDZPPN002044501,
title = {Embedding relations in the lattice of recursively enumerable sets.},
journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung},
volume = {17},
year = {1975},
pages = {37-42},
zbl = {0315.02040},
url = {http://dml.mathdoc.fr/item/GDZPPN002044501}
}
Alton, Donald A. Embedding relations in the lattice of recursively enumerable sets.. Archiv für mathematische Logik und Grundlagenforschung, Tome 17 (1975) pp. 37-42. http://gdmltest.u-ga.fr/item/GDZPPN002044501/