Sources:
Moore, Gerry; Kershner, Bruce; Tufts, Craig; Mathews, Daniel; et al. (2008). National Wildlife Federation Field Guide to Trees of North America. New York: Sterling. p. 81. ISBN 978-1-4027-3875-3.
https://www.nps.gov/crmo/learn/nature/limber-pine.htm
https://www.monumentaltrees.com/en/can/alberta/nordegg/13764_whirlpoolpoint/
https://extension.usu.edu/rangeplants/shrubs-and-trees/LimberPine
https://www.nps.gov/gis/storymaps/cascade/v1/index.html?appid=cdf1e11268eb42f1bdb758725a7ebcb8
https://www.livescience.com/33663-walking-tree-socratea-exorrhiza.html
https://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442007000300005
https://tropical.theferns.info/viewtropical.php?id=Socratea+exorrhiza
https://palms.org/wp-content/uploads/2016/05/v29n2p64-71.pdf
https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:1200702-2