In a side box there is this text
“Researchr is a web site for finding, collecting, sharing, and reviewing scientific publications, for researchers by researchers.
Sign up for an account to create a profile with publication list, tag and review your related work, and share bibliographies with your co-authors.”

The sign up link appears to be broken (the signup link on top of the page works instead).

Submitted by Federico Tomassetti on 17 February 2013 at 09:32

Thanks for reporting! The link is now fixed.