@article{1093635416, author = {Surendonk, Timothy J.}, title = {A lemma in the logic of action.}, journal = {Notre Dame J. Formal Logic}, volume = {31}, number = {2}, year = {1990}, pages = { 222-224}, language = {en}, url = {http://dml.mathdoc.fr/item/1093635416} }
Surendonk, Timothy J. A lemma in the logic of action.. Notre Dame J. Formal Logic, Tome 31 (1990) no. 2, pp. 222-224. http://gdmltest.u-ga.fr/item/1093635416/