Alobaidi, G., and R. Mallier. “On the Abel Equation of the Second Kind With Sinusoidal Forcing”. Nonlinear Analysis: Modelling and Control 12, no. 1 (January 25, 2007): 33–44. Accessed May 6, 2024. https://www.journals.vu.lt/nonlinear-analysis/article/view/14720.