@article{1183735111, author = {Richter, Wayne}, title = {Extensions of the Constructive Ordinals}, journal = {J. Symbolic Logic}, volume = {30}, number = {1}, year = {1965}, pages = { 193-211}, language = {en}, url = {http://dml.mathdoc.fr/item/1183735111} }
Richter, Wayne. Extensions of the Constructive Ordinals. J. Symbolic Logic, Tome 30 (1965) no. 1, pp. 193-211. http://gdmltest.u-ga.fr/item/1183735111/