Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{KYB_1992__28_Suppl_a5, author = {Mattila, Jorma K.}, title = {Modified modus ponens and modal logic}, journal = {Kybernetika}, pages = {28--32}, publisher = {mathdoc}, volume = {28}, number = {Suppl}, year = {1992}, mrnumber = {1226047}, zbl = {0861.03011}, language = {en}, url = {http://geodesic.mathdoc.fr/item/KYB_1992__28_Suppl_a5/} }
Mattila, Jorma K. Modified modus ponens and modal logic. Kybernetika, Tome 28 (1992) no. Suppl, pp. 28-32. http://geodesic.mathdoc.fr/item/KYB_1992__28_Suppl_a5/