Approximating the Exponential, the Lanczos Method and an $\tilde{O}(m)$-Time Spectral Algorithm for Balanced Separator. Orecchia, L., Sachdeva, S., & Vishnoi, N. K. In STOC, 2012.
bibtex   
@inproceedings{OSV12,
  author    = {Lorenzo Orecchia and
               Sushant Sachdeva and
               Nisheeth K. Vishnoi},
  title     = {Approximating the Exponential, the Lanczos Method and an $\tilde{O}(m)$-Time Spectral Algorithm for Balanced Separator},
 booktitle   = {STOC},
  year      = {2012},
}

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