@article{1183740617, author = {Cohen, Daniel E.}, title = {Degree Problems for Modular Machines}, journal = {J. Symbolic Logic}, volume = {45}, number = {1}, year = {1980}, pages = { 510-528}, language = {en}, url = {http://dml.mathdoc.fr/item/1183740617} }
Cohen, Daniel E. Degree Problems for Modular Machines. J. Symbolic Logic, Tome 45 (1980) no. 1, pp. 510-528. http://gdmltest.u-ga.fr/item/1183740617/