@article{1093958148, author = {Goddard, Leonard}, title = {An augmented modal logic.}, journal = {Notre Dame J. Formal Logic}, volume = {6}, number = {1}, year = {1965}, pages = { 81-98}, language = {en}, url = {http://dml.mathdoc.fr/item/1093958148} }
Goddard, Leonard. An augmented modal logic.. Notre Dame J. Formal Logic, Tome 6 (1965) no. 1, pp. 81-98. http://gdmltest.u-ga.fr/item/1093958148/