@article{1183739720,
author = {Weispfenning, Volker},
title = {Negative-Existentially Complete Structures and Definability in Free Extensions},
journal = {J. Symbolic Logic},
volume = {41},
number = {1},
year = {1976},
pages = { 95-108},
language = {en},
url = {http://dml.mathdoc.fr/item/1183739720}
}
Weispfenning, Volker. Negative-Existentially Complete Structures and Definability in Free Extensions. J. Symbolic Logic, Tome 41 (1976) no. 1, pp. 95-108. http://gdmltest.u-ga.fr/item/1183739720/