@article{1183741002, author = {Steel, John R.}, title = {A Classification of Jump Operator}, journal = {J. Symbolic Logic}, volume = {47}, number = {1}, year = {1982}, pages = { 347-358}, language = {en}, url = {http://dml.mathdoc.fr/item/1183741002} }
Steel, John R. A Classification of Jump Operator. J. Symbolic Logic, Tome 47 (1982) no. 1, pp. 347-358. http://gdmltest.u-ga.fr/item/1183741002/