Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{AMLG_1950__1_137716, author = {Y. Bar-Hillel}, title = {Bolzano's propositional {Logic.}}, journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung}, pages = {65--98}, publisher = {mathdoc}, volume = {1}, year = {1950}, zbl = {0047.01201}, url = {http://geodesic.mathdoc.fr/item/AMLG_1950__1_137716/} }
Y. Bar-Hillel. Bolzano's propositional Logic.. Archiv für mathematische Logik und Grundlagenforschung, Tome 1 (1950), pp. 65-98. http://geodesic.mathdoc.fr/item/AMLG_1950__1_137716/