%0 Journal Article %A Stanley Burris %A Errol Jeffers %T On the simplicity and subdirect irreducibility of Boolean ultrapowers %J Colloquium Mathematicum %D 1978 %P 215-218 %V 39 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-39-2-215-218/ %R 10.4064/cm-39-2-215-218 %G en %F 10_4064_cm_39_2_215_218