Reference Linking Demo - Example Linked Papers

What is reference linking?
Why are linked papers in PDF?
About SFX-style interface
About link colours

arXiv.org ID	Full Text (no links)	Full Text (reference linked)
hep-th/9902197	PDF version	linked PDF (SFX on)	linked PDF (SFX off)
hep-th/9912152	PDF version	linked PDF (SFX on)	linked PDF (SFX off)

**Well-linked Examples**
arXiv.org Documents with many red links	hep-th/9911022	hep-th/9912182	hep-th/9902197
arXiv.org Documents with many orange links	hep-th/9906152	hep-th/9908153	hep-th/9910015