@article{SPHM_1986___4_A1_0,
     author = {Porte, Jean},
     title = {Les logiques modales},
     journal = {S\'eminaire de Philosophie et Math\'ematiques},
     pages = {1--12},
     publisher = {\'Ecole Normale Sup\'erieure},
     number = {4},
     year = {1986},
     language = {fr},
     url = {http://www.numdam.org/item/SPHM_1986___4_A1_0/}
}