@article{1183742923, author = {Royer, James S.}, title = {Two Recursion Theoretic Characterizations of Proof Speed-Ups}, journal = {J. Symbolic Logic}, volume = {54}, number = {1}, year = {1989}, pages = { 522-526}, language = {en}, url = {http://dml.mathdoc.fr/item/1183742923} }
Royer, James S. Two Recursion Theoretic Characterizations of Proof Speed-Ups. J. Symbolic Logic, Tome 54 (1989) no. 1, pp. 522-526. http://gdmltest.u-ga.fr/item/1183742923/