@article{1093890628, author = {Leblanc, Hugues and Snyder, D. Paul}, title = {Duals of Smullyan trees.}, journal = {Notre Dame J. Formal Logic}, volume = {13}, number = {3}, year = {1972}, pages = { 387-393}, language = {en}, url = {http://dml.mathdoc.fr/item/1093890628} }
Leblanc, Hugues; Snyder, D. Paul. Duals of Smullyan trees.. Notre Dame J. Formal Logic, Tome 13 (1972) no. 3, pp. 387-393. http://gdmltest.u-ga.fr/item/1093890628/