@article{1183732663, author = {Smullyan, Raymond M.}, title = {Languages in Which Self Reference is Possible}, journal = {J. Symbolic Logic}, volume = {22}, number = {1}, year = {1957}, pages = { 55-67}, language = {en}, url = {http://dml.mathdoc.fr/item/1183732663} }
Smullyan, Raymond M. Languages in Which Self Reference is Possible. J. Symbolic Logic, Tome 22 (1957) no. 1, pp. 55-67. http://gdmltest.u-ga.fr/item/1183732663/