@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/