@article{1093888119, author = {Catlin, Seth}, title = {Pathologies in the ed-regressive sets of order $2$.}, journal = {Notre Dame J. Formal Logic}, volume = {18}, number = {1}, year = {1977}, pages = { 535-544}, language = {en}, url = {http://dml.mathdoc.fr/item/1093888119} }
Catlin, Seth. Pathologies in the ed-regressive sets of order $2$.. Notre Dame J. Formal Logic, Tome 18 (1977) no. 1, pp. 535-544. http://gdmltest.u-ga.fr/item/1093888119/