@article{1093882415, author = {Cleave, J. P.}, title = {The axiomatisation of theories of material necessity.}, journal = {Notre Dame J. Formal Logic}, volume = {20}, number = {1}, year = {1979}, pages = { 180-190}, language = {en}, url = {http://dml.mathdoc.fr/item/1093882415} }
Cleave, J. P. The axiomatisation of theories of material necessity.. Notre Dame J. Formal Logic, Tome 20 (1979) no. 1, pp. 180-190. http://gdmltest.u-ga.fr/item/1093882415/