Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{AMLG_1971__9_137790, author = {Kurt Sch\"utte and John N. Crossley}, title = {Non-Uniqueness at ... in {Kleene's} {O.}}, journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung}, pages = {95--101}, publisher = {mathdoc}, volume = {9}, year = {1971}, url = {http://geodesic.mathdoc.fr/item/AMLG_1971__9_137790/} }
Kurt Schütte; John N. Crossley. Non-Uniqueness at ... in Kleene's O.. Archiv für mathematische Logik und Grundlagenforschung, Tome 9 (1971), pp. 95-101. http://geodesic.mathdoc.fr/item/AMLG_1971__9_137790/