Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{MASLO_1978__28_1_a3, author = {Dvure\v{c}enskij, Anatolij}, title = {Signed states on a logic}, journal = {Mathematica slovaca}, pages = {33--40}, publisher = {mathdoc}, volume = {28}, number = {1}, year = {1978}, mrnumber = {527772}, zbl = {0372.02017}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MASLO_1978__28_1_a3/} }
Dvurečenskij, Anatolij. Signed states on a logic. Mathematica slovaca, Tome 28 (1978) no. 1, pp. 33-40. http://geodesic.mathdoc.fr/item/MASLO_1978__28_1_a3/