@article{1093891805,
author = {Gersting, Judith},
title = {Universal pairs of regressive isols.},
journal = {Notre Dame J. Formal Logic},
volume = {16},
number = {1},
year = {1975},
pages = { 409-414},
language = {en},
url = {http://dml.mathdoc.fr/item/1093891805}
}
Gersting, Judith. Universal pairs of regressive isols.. Notre Dame J. Formal Logic, Tome 16 (1975) no. 1, pp. 409-414. http://gdmltest.u-ga.fr/item/1093891805/