@article{1183745184, author = {Peterson, Douglas}, title = {Cardinal Functions on Ultraproducts of Boolean Algebras}, journal = {J. Symbolic Logic}, volume = {62}, number = {1}, year = {1997}, pages = { 43-59}, language = {en}, url = {http://dml.mathdoc.fr/item/1183745184} }
Peterson, Douglas. Cardinal Functions on Ultraproducts of Boolean Algebras. J. Symbolic Logic, Tome 62 (1997) no. 1, pp. 43-59. http://gdmltest.u-ga.fr/item/1183745184/