People publish papers. A lot of people publish a lot of papers.
Managing them if a headache if you are in an active research field.
I have seen a lot of bibliography management software coming out in the past few years. They have greatly simplified paper management.
And I am still seeing new ideas keeping coming out.
This is a new frontier.
PS: I just came across an interesting research on this. Check it out: http://www.cs.umd.edu/hcil/ase/