@Article{vazquez2006modeling,
  author = {Vázquez, Alexei and Gama Oliveira, João and Dezsö, Zoltán and Goh, Kwang-Il and Kondor, Imre and Barabási, Albert-László},
  title  = {Modeling bursts and heavy tails in human dynamics},
  journal = {Physical Review E},
  year   = {2006},
  number = {3},
  url    = {http://link.aps.org/doi/10.1103/PhysRevE.73.036127},
  doi = {10.1103/PhysRevE.73.036127},
  const  = {\ text}
}
@Inproceedings{kondor02diffusionkernel,
  author = {Kondor, Risi Imre and Lafferty, John D.},
  title  = {Diffusion Kernels on Graphs and Other Discrete Input Spaces},

  year   = {2002},
  number = {},
  url    = {http://www.cs.cmu.edu/~lafferty/pub/diffusion-kernels.ps},

  const  = {\ text}
}