@article{10_1017_S0017089508004400,
     author = {DAWS, MATTHEW},
     title = {ULTRAPOWERS {OF} {BANACH} {ALGEBRAS} {AND} {MODULES}},
     journal = {Glasgow mathematical journal},
     pages = {539--555},
     year = {2008},
     volume = {50},
     number = {3},
     doi = {10.1017/S0017089508004400},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089508004400/}
}