@article{1183736096,
author = {Appel, K.},
title = {Review: Donald A. Martin, Classes of Recursively Enumerable Sets and Degrees of Unsolvability},
journal = {J. Symbolic Logic},
volume = {32},
number = {1},
year = {1967},
language = {en},
url = {http://dml.mathdoc.fr/item/1183736096}
}
Appel, K. Review: Donald A. Martin, Classes of Recursively Enumerable Sets and Degrees of Unsolvability. J. Symbolic Logic, Tome 32 (1967) no. 1, . http://gdmltest.u-ga.fr/item/1183736096/