[texhax] article formatting help?

[sara]

hello, i'm writing an article that needs to be 2-column, with abstract at
the top going across both columns, labeled sections with the content of
'materials' and 'methods' in a smaller font size, and citations in the
bottom of each page rather than all at the end.  most of those elements i
have already, but how do i specify a smaller font size for certain
sections?  and how do i get the citations to appear on each page as they
show up in the text?

any suggestions would be greatly appreciated!  thank you,
sara
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