Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{AMLG_1975__17_137900, author = {Donald A. Alton}, title = {A characterization of r-maximal sets.}, journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung}, pages = {35--36}, publisher = {mathdoc}, volume = {17}, year = {1975}, zbl = {0315.02039}, url = {http://geodesic.mathdoc.fr/item/AMLG_1975__17_137900/} }
Donald A. Alton. A characterization of r-maximal sets.. Archiv für mathematische Logik und Grundlagenforschung, Tome 17 (1975), pp. 35-36. http://geodesic.mathdoc.fr/item/AMLG_1975__17_137900/