I think I figured out one way to do it...Let's say you have 2 dimensions (Dimension1 and Dimension2) and 1 expression (vExpression) in your straight table, the code would be...
Rank(TOTAL -$(vExpression)) /
Count(TOTAL aggr($(vExpression), [Dimension1],[Dimension2]))
You may need to modify slightly for your specific example. My guess is something like...
Rank(TOTAL -[Citation Counts]) /
Count(TOTAL aggr([Citation Counts], [Journal],[Year Published],[Document Type],[Year Cited]))
Hope that helps.