Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{AMLG_1969__12_137820, author = {H. Leblanc and R.K. Meyer}, title = {Open formulas and the empty domain.}, journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung}, pages = {78--84}, publisher = {mathdoc}, volume = {12}, year = {1969}, zbl = {0181.29801}, url = {http://geodesic.mathdoc.fr/item/AMLG_1969__12_137820/} }
H. Leblanc; R.K. Meyer. Open formulas and the empty domain.. Archiv für mathematische Logik und Grundlagenforschung, Tome 12 (1969), pp. 78-84. http://geodesic.mathdoc.fr/item/AMLG_1969__12_137820/