@article{PDML_1978__15_1_39_0,
     author = {Becchio, Denise},
     title = {Deux d\'efinitions des alg\`ebres de {Heyting} trivalentes involutives},
     journal = {Publications du D\'epartement de math\'ematiques (Lyon)},
     pages = {39--44},
     publisher = {Universit\'e Claude Bernard - Lyon 1},
     volume = {15},
     number = {1},
     year = {1978},
     mrnumber = {545753},
     zbl = {0415.03051},
     language = {fr},
     url = {http://www.numdam.org/item/PDML_1978__15_1_39_0/}
}