@article{1183739309,
author = {Goldfarb, Warren D. and Lewis, Harry R.},
title = {Skolem Reduction Classes},
journal = {J. Symbolic Logic},
volume = {40},
number = {1},
year = {1975},
pages = { 62-68},
language = {en},
url = {http://dml.mathdoc.fr/item/1183739309}
}
Goldfarb, Warren D.; Lewis, Harry R. Skolem Reduction Classes. J. Symbolic Logic, Tome 40 (1975) no. 1, pp. 62-68. http://gdmltest.u-ga.fr/item/1183739309/