@article{1183738758, author = {Jockusch, Carl G. and Soare, Robert I.}, title = {Post's Problem and His Hypersimple Set}, journal = {J. Symbolic Logic}, volume = {38}, number = {1}, year = {1973}, pages = { 446-452}, language = {en}, url = {http://dml.mathdoc.fr/item/1183738758} }
Jockusch, Carl G.; Soare, Robert I. Post's Problem and His Hypersimple Set. J. Symbolic Logic, Tome 38 (1973) no. 1, pp. 446-452. http://gdmltest.u-ga.fr/item/1183738758/