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@article{AMLG_1966__10_137795, author = {Peter H.G. Aczel}, title = {Paths in {Kleene's} 0.}, journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung}, pages = {8--12}, publisher = {mathdoc}, volume = {10}, year = {1966}, zbl = {0153.31602}, url = {http://geodesic.mathdoc.fr/item/AMLG_1966__10_137795/} }
Peter H.G. Aczel. Paths in Kleene's 0.. Archiv für mathematische Logik und Grundlagenforschung, Tome 10 (1966), pp. 8-12. http://geodesic.mathdoc.fr/item/AMLG_1966__10_137795/