Scheve, Tom.
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Oct. 2009. https://adventure.howstuffworks.com/outdoor-activities/snow-sports/cross-country-skiing.htm#:~:text=The%20Physics%20of%20Cross%2Dcountry%20Skiing,-Cross%2Dcountry%20skiers&text=When%20skiing%20downhill%2C%20less%20friction,and%20distance%20with%20less%20effort.&text=The%20rearrangement%20of%20these%20molecules,resistance%2C%20which%20slows%20down%20skiers.
web. sat. 21, November 2020.
Christensen,
Arnfinn . "The physics of cross-country
skiing". Science Norway, 9
January 2012.
https://sciencenorway.no/forskningno-norway-physics/the-physics-of-cross-country-skiing/1429140.
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sat. 21, November 2020.
"Cross-country
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Wikimedia Foundation, https://en.wikipedia.org/wiki/Cross-country_skiing
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Fulton, Alex.
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Norwi Ski.
https://www.norwiski.com/cross-country-skiing-downhill. web.
sun. 22, November 2020.
some
information comes from my personal experiences
images not
previously sited were taken by Cynan Hellmann