To cite treeclim in publications, please use:

  Zang C, Biondi F (2015). “treeclim: an R package for the numerical
  calibration of proxy-climate relationships.” _Ecography_, *38*(4),
  431-436. ISSN 1600-0587, doi:10.1111/ecog.01335
  <https://doi.org/10.1111/ecog.01335>.

A BibTeX entry for LaTeX users is

  @Article{Zang2015a,
    title = {treeclim: an R package for the numerical calibration of proxy-climate relationships},
    journal = {Ecography},
    volume = {38},
    number = {4},
    pages = {431-436},
    year = {2015},
    issn = {1600-0587},
    doi = {10.1111/ecog.01335},
    author = {Christian Zang and Franco Biondi},
  }