%0 Journal Article %A Gaspar-Arreola, M.Á. %A Hernández-Hernández, F. %T The product of two ordinals is hereditarily dually discrete %J Commentationes Mathematicae Universitatis Carolinae %D 2012 %P 99-104 %V 53 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_2012__53_1_a6/ %G en %F CMUC_2012__53_1_a6