@article{1183736196, author = {Richter, Wayne}, title = {Constructively Accessible Ordinal Numbers}, journal = {J. Symbolic Logic}, volume = {33}, number = {1}, year = {1968}, pages = { 43-55}, language = {en}, url = {http://dml.mathdoc.fr/item/1183736196} }
Richter, Wayne. Constructively Accessible Ordinal Numbers. J. Symbolic Logic, Tome 33 (1968) no. 1, pp. 43-55. http://gdmltest.u-ga.fr/item/1183736196/