To cite ecp in publications use:

David S. Matteson, Nicholas A. James (2013). ecp: An R Package for Nonparametric Multiple Change Point Analysis of Multivariate Data Technical report Cornell University.

Corresponding BibTeX entry:

  @TechReport{,
    title = {{ecp}: An R Package for Nonparametric Multiple Change
      Point Analysis of Multivariate Data},
    author = {David S. Matteson and Nicholas A. James},
    institution = {Cornell University},
    year = {2013},
  }