@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/