Vishwanathan, Sundar

• The Electronic Journal of Combinatorics Volume 16, Issue 1 (2009) - Notes
  Bipartite Coverings and the Chromatic Number
  Abstract  PDF
• The Electronic Journal of Combinatorics Volume 22, Issue 1 (2015) - Papers
  On Graph Parameters Guaranteeing Fast Sandpile Diffusion
  Abstract  PDF  source files  Official source