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@article{CMH_1976__51_139664, author = {Hilbert Levitz}, title = {Ordinal {Bounds} for {Well} {Ordered} {Extensions} of the {Coordinatewise} {Partial} {Ordering}}, journal = {Commentarii mathematici Helvetici}, pages = {389--394}, publisher = {mathdoc}, volume = {51}, year = {1976}, zbl = {0381.06001}, url = {http://geodesic.mathdoc.fr/item/CMH_1976__51_139664/} }
Hilbert Levitz. Ordinal Bounds for Well Ordered Extensions of the Coordinatewise Partial Ordering. Commentarii mathematici Helvetici, Tome 51 (1976), pp. 389-394. http://geodesic.mathdoc.fr/item/CMH_1976__51_139664/