@article{SchulerLipmanSteinbachetal.2005,
  author    = {Benjamin Schuler and Everett A. Lipman and P. J. Steinbach and Michael Uwe Kumke and W. A. Eaton},
  title     = {Polyproline and the "spectroscopic ruler" revisited with single-molecule fluorescence},
  year      = {2005},
}