@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/