@article{1183738943,
author = {Gregory, John},
title = {Beth Definability in Infinitary Languages},
journal = {J. Symbolic Logic},
volume = {39},
number = {1},
year = {1974},
pages = { 22-26},
language = {en},
url = {http://dml.mathdoc.fr/item/1183738943}
}
Gregory, John. Beth Definability in Infinitary Languages. J. Symbolic Logic, Tome 39 (1974) no. 1, pp. 22-26. http://gdmltest.u-ga.fr/item/1183738943/