@article{1183739782, author = {Lerman, Manuel}, title = {Types of Simple $\alpha$-Recursively Enumerable Sets}, journal = {J. Symbolic Logic}, volume = {41}, number = {1}, year = {1976}, pages = { 419-426}, language = {en}, url = {http://dml.mathdoc.fr/item/1183739782} }
Lerman, Manuel. Types of Simple $\alpha$-Recursively Enumerable Sets. J. Symbolic Logic, Tome 41 (1976) no. 1, pp. 419-426. http://gdmltest.u-ga.fr/item/1183739782/