@article{DBLP:journals/jsyml/Lob72,
author = {M. H. Lob},
title = {A Reduction Theorem for Predicate Logic},
journal = {J. Symb. Log.},
volume = {37},
number = {2},
year = {1972},
pages = {352-354},
bibsource = {DBLP, http://dblp.uni-trier.de}
}