@article{1093636942,
author = {Williamson, Timothy},
title = {Invertible definitions.},
journal = {Notre Dame J. Formal Logic},
volume = {28},
number = {1},
year = {1987},
pages = { 244-258},
language = {en},
url = {http://dml.mathdoc.fr/item/1093636942}
}
Williamson, Timothy. Invertible definitions.. Notre Dame J. Formal Logic, Tome 28 (1987) no. 1, pp. 244-258. http://gdmltest.u-ga.fr/item/1093636942/