@article{DBLP:journals/jsyml/Lerman71,
author = {Manuel Lerman},
title = {Some Theorems on R-Maximal Sets and Major Subsets of Recursively
Enumerable Sets},
journal = {J. Symb. Log.},
volume = {36},
number = {2},
year = {1971},
pages = {193-215},
bibsource = {DBLP, http://dblp.uni-trier.de}
}