@article{1093887923, author = {Wilson, Robert L.}, title = {The modal predicate logics ${\bf PF}^*{\bf F}$.}, journal = {Notre Dame J. Formal Logic}, volume = {18}, number = {1}, year = {1977}, pages = { 208-220}, language = {en}, url = {http://dml.mathdoc.fr/item/1093887923} }
Wilson, Robert L. The modal predicate logics ${\bf PF}^*{\bf F}$.. Notre Dame J. Formal Logic, Tome 18 (1977) no. 1, pp. 208-220. http://gdmltest.u-ga.fr/item/1093887923/