To cite litterfitter in publications use:

Cornwell WK, Weedon JT (2014). “Decomposition trajectories of diverse litter types: a model selection analysis.” Methods in Ecology and Evolution, 5, 173-182. doi:10.1111/2041-210X.12138.

Corresponding BibTeX entry:

  @Article{,
    title = {Decomposition trajectories of diverse litter types: a
      model selection analysis},
    author = {William K. Cornwell and James T. Weedon},
    journal = {Methods in Ecology and Evolution},
    year = {2014},
    volume = {5},
    pages = {173-182},
    doi = {10.1111/2041-210X.12138},
  }