@inbook{nadler_lafon_coifman_kevrekidis_2008, 
  title={Diffusion Maps - a Probabilistic Interpretation for Spectral Embedding and Clustering Algorithms}, 
  DOI={10.1007/978-3-540-73750-6_10}, 
  publisher={Springer Berlin Heidelberg}, 
  author={Nadler and Lafon and Coifman and Kevrekidis}, 
  year={2008}
  }