Andrews, S. (2016, December 21). The world's first roller coaster was constructed on orders of Catherine II (the Great) of Russia. Retrieved October 26, 2020, from https://www.thevintagenews.com/2016/12/22/catherine-ii-the-great-of-russia-ordered-the-construction-of-the-worlds-first-roller-coaster/
Glover, E. (2011, December 12). Things You Might Not Know About the Matterhorn at Disneyland Resort. Retrieved October 27, 2020, from https://disneyparks.disney.go.com/blog/2011/12/things-you-might-not-know-about-the-matterhorn-at-disneyland-resort/
Harris, T., & Threewitt, C. (2020, January 27). How Roller Coasters Work. Retrieved October 26, 2020, from https://science.howstuffworks.com/engineering/structural/roller-coaster1.htm
Levine, A. (2017, July 28). Ups and downs: The history of roller coasters. Retrieved October 26, 2020, from https://www.usatoday.com/story/travel/experience/america/theme-parks/2017/07/28/history-roller-coasters/518356001/
Long, T. (2018, January 14). June 16, 1884: A Technology With Plenty of Ups and Downs. Retrieved October 26, 2020, from https://www.wired.com/2011/06/0616gravity-roller-coaster/
T, G. (2016, December 18). Grace Thomas: Roller Coaster Polynomials. Retrieved October 28, 2020, from https://prezi.com/ngi-kbbfyhyo/grace-thomas-roller-coaster-polynomials/