Please cite both PaleoClim and original datasets used.

PaleoClim and dataset 'mis19':

  Brown Jason L, et al. "PaleoClim, high spatial resolution
  paleoclimate surfaces for global land areas". Scientific Data 5.
  (2018): 180254.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {PaleoClim, high spatial resolution paleoclimate surfaces for global land areas},
    author = {Brown {Jason L} and Hill {Daniel J} and Dolan {Aisling M} and Carnaval {Ana C} and Haywood {Alan M}},
    journal = {Scientific Data},
    year = {2018},
    volume = {5},
    pages = {180254},
    url = {https://www.nature.com/articles/sdata2018254},
    doi = {10.1038/sdata.2018.254},
  }

Datasets 'lh', 'mh', 'eh', 'yds', 'ba' and 'hs1':

  Fordham Damien A, et al. "PaleoView: a tool for generating continuous
  climate projections spanning the last 21 000 years at regional and
  global scales". Ecography 40. (2017): 1348-1358.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {PaleoView: a tool for generating continuous climate projections spanning the last 21 000 years at regional and global scales},
    author = {Fordham {Damien A} and Saltré Frédérik and Haythorne Sean and Wigley {Tom M L} and Otto-Bliesner {Bette L} and Chan {Ka Ching} and Brook {Barry W}},
    journal = {Ecography},
    year = {2017},
    volume = {40},
    issue = {11},
    pages = {1348-1358},
    url = {https://onlinelibrary.wiley.com/doi/full/10.1111/ecog.03031},
    doi = {10.1111/ecog.03031},
  }

Dataset 'lig':

  Otto-Bliesner Bette L., et al. "Simulating Arctic Climate Warmth and
  Icefield Retreat in the Last Interglaciation". Science 311. (2006):
  1751-1753.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Simulating Arctic Climate Warmth and Icefield Retreat in the Last Interglaciation},
    author = {Otto-Bliesner {Bette L.} and Marshall {Shawn J.} and Overpeck {Jonathan T.} and Miller {Gifford H.} and Hu Aixue and CAPE Last Interglacial Project members},
    journal = {Science},
    year = {2006},
    volume = {311},
    issue = {5768},
    pages = {1751-1753},
    url = {https://www.science.org/doi/10.1126/science.1120808},
    doi = {10.1126/science.1120808},
  }

Dataset 'mpwp':

  Hill Daniel J. "The non-analogue nature of Pliocene temperature
  gradients ". Earth and Planetary Science Letters 425. (2015):
  232-241.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {The non-analogue nature of Pliocene temperature gradients},
    author = {Hill {Daniel J}},
    journal = {Earth and Planetary Science Letters},
    year = {2015},
    volume = {425},
    pages = {232-241},
    url = {https://www.sciencedirect.com/science/article/pii/S0012821X15003428},
    doi = {10.1016/j.epsl.2015.05.044},
  }

Dataset 'm2':

  Dolan Aisling M, et al. "Modelling the enigmatic Late Pliocene
  Glacial Event — Marine Isotope Stage M2". Global and Planetary Change
  128. (2015): 47-60.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Modelling the enigmatic Late Pliocene Glacial Event — Marine Isotope Stage M2},
    author = {Dolan {Aisling M} and Haywood {Alan M} and Hunter {Stephen J} and Tindall {Julia C} and Dowsett {Harry J} and Hill {Daniel J} and Pickering {Steven J}},
    journal = {Global and Planetary Change},
    year = {2015},
    volume = {128},
    pages = {47-60},
    url = {https://www.sciencedirect.com/science/article/pii/S0921818115000399},
    doi = {10.1016/j.gloplacha.2015.02.001},
  }

Dataset 'cur' and 'lgm' (CHELSA):

  Karger Dirk Nikolaus, et al. "Climatologies at high resolution for
  the earth’s land surface areas". Scientific Data 4. (2017): 170122.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Climatologies at high resolution for the earth’s land surface areas},
    author = {Karger {Dirk Nikolaus} and Conrad Olaf and Böhner Jürgen and Kawohl Tobias and Kreft Holger and Soria-Auza {Rodrigo Wilber} and Zimmermann {Niklaus E} and Linder {H Peter} and kessler Michael},
    journal = {Scientific Data},
    year = {2017},
    volume = {4},
    pages = {170122},
    url = {https://www.nature.com/articles/sdata2017122},
    doi = {10.1038/sdata.2017.122},
  }