References
- Hartman, G. (2018). APEX calculus. http://www.apexcalculus.com/
- Hass, J., Weir, M. D., Thomas Jr., G. B. (2016) University Calculus: Early Trancendentals. Boston, MA: Pearson.
- Pennings, T. J. (2003). Do dogs know calculus? College Math. J. 34(3): 178–182. doi.org/ DOI: 10.1080/07468342.2003.11922003.
- Stewart, J., Clegg, D., Watson, S. (2016) Calculus. Boston, MA: Cengage.
- Strang, G., Herman, E. (2016). Openstax Calculus. https://openstax.org/details/books/calculus-volume-1