Geometric diffusions as a tool for harmonic analysis and structure definition of data: Diffusion maps; Coifman, Lafon, Lee, Maggioni, Nadler, Warner, Zucker - manifold learning
@inproceedings{ lee05automatic,
author = "U. Lee and Z. Liu and J. Cho",
title = "Automatic identification of user goals in web search",
booktitle = "WWW2005",
year = "2005",
url = "citeseer.ist.psu.edu/article/lee05automatic.html" }