@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/