@article{1183738786, author = {Bredlau, C. E.}, title = {Review: Wayne H. Richter, Regressive Sets of Order n}, journal = {J. Symbolic Logic}, volume = {38}, number = {1}, year = {1973}, language = {en}, url = {http://dml.mathdoc.fr/item/1183738786} }
Bredlau, C. E. Review: Wayne H. Richter, Regressive Sets of Order n. J. Symbolic Logic, Tome 38 (1973) no. 1, . http://gdmltest.u-ga.fr/item/1183738786/