@article{DBLP:journals/apal/Lerman98,
author = {Manuel Lerman},
title = {A Necessary and Sufficient Condition for Embedding Ranked
Finite Partial Lattices into the Computably Enumerable Degrees},
journal = {Ann. Pure Appl. Logic},
volume = {94},
number = {1-3},
year = {1998},
pages = {143-180},
ee = {http://dx.doi.org/10.1016/S0168-0072(97)00071-7},
bibsource = {DBLP, http://dblp.uni-trier.de}
}