I think one of the seminal papers is by Belkin and Niyogi:<p><a href="http:&#x2F;&#x2F;people.cs.uchicago.edu&#x2F;~niyogi&#x2F;papersps&#x2F;BNcolt05.pdf" rel="nofollow">http:&#x2F;&#x2F;people.cs.uchicago.edu&#x2F;~niyogi&#x2F;papersps&#x2F;BNcolt05.pdf</a>