http://www.physics.gmu.edu/classinfo/astr103/CourseNotes/ECText/ch23_txt.htm#23.5.
I am certain that there are come good arguments for a closed universe
also, as I wrote a paper last year discussing the issue. Unfortunately it
is still located back home with mummy and daddy and demands an excursion.
When I have recovered the paper in a few weeks (if I remember) I will
return to the issue...
-- transient@mindless.com