References
- Boyce, W. C., DiPrima, R. C., & Meade, D. B. (2017). Elementary differential equations (11th ed). Wiley.
- Dennis Lawrence, J. (1972). A catalog of special plane curves. Dover Publications.
- Grimshaw, R. (1990). Nonlinear ordinary differential equations. Blackwell Scientific.
- Henry Edwards, C., Penney, D. E., & Calvis, D. T. (2018). Differential equations and linear algebra (Fourth ed.). Pearson.
- Stepanov, V. V. (1950). Course of differential equations, (in Russian). Fizmatlit.
- Zill, D. G. (2017). A first Course in differential equations with modeling applications (11th ed.). Cengage Learning.