@article{1093888219,
author = {Bergstra, Jan},
title = {Degrees of partial functions.},
journal = {Notre Dame J. Formal Logic},
volume = {19},
number = {1},
year = {1978},
pages = { 152-154},
language = {en},
url = {http://dml.mathdoc.fr/item/1093888219}
}
Bergstra, Jan. Degrees of partial functions.. Notre Dame J. Formal Logic, Tome 19 (1978) no. 1, pp. 152-154. http://gdmltest.u-ga.fr/item/1093888219/