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Aerodynamics of a cow. (brez datuma). Pridobljeno 24. april 2021 iz reddit: https://www.reddit.com/r/interestingasfuck/comments/3j96p1/aerodynamics_of_a_cow/

Are cows very aerodynamic? (22. lulij 2018). Pridobljeno 24. april 2021 iz Quora: https://www.quora.com/Are-cows-very-aerodynamic?share=1

Drag (physics). (6. april 2021). Pridobljeno 24. april 2021 iz Wikipedia: https://en.wikipedia.org/wiki/Drag_%28physics%29

Drag coefficient. (2. marec 2021). Pridobljeno 24. april 2021 iz Wikipedia: https://en.wikipedia.org/wiki/Drag_coefficient

Spherical cow. (20. april 2021). Pridobljeno 24. april 2021 iz Wikipedia: https://en.wikipedia.org/wiki/Spherical_cow