@article{1183740512, author = {Baumgartner, James E.}, title = {Chains and Antichains in $\mathscr{P}(\omega)$}, journal = {J. Symbolic Logic}, volume = {45}, number = {1}, year = {1980}, pages = { 85-92}, language = {en}, url = {http://dml.mathdoc.fr/item/1183740512} }
Baumgartner, James E. Chains and Antichains in $\mathscr{P}(\omega)$. J. Symbolic Logic, Tome 45 (1980) no. 1, pp. 85-92. http://gdmltest.u-ga.fr/item/1183740512/