To cite crawl in publications:

Johnson D, London J, Lea M, Durban J (2008). “Continuous-time correlated random walk model for animal telemetry data.” Ecology, 89(5), 1208-1215. doi:10.1890/07-1032.1.

Corresponding BibTeX entry:

  @Article{,
    title = {Continuous-time correlated random walk model for animal
      telemetry data},
    author = {D.S. Johnson and J.M. London and M.-A. Lea and J.W.
      Durban},
    journal = {Ecology},
    year = {2008},
    volume = {89},
    number = {5},
    pages = {1208-1215},
    doi = {10.1890/07-1032.1},
  }