P. Karthikeyan, and R.Arul. “Stability for Impulsive Implicit Hadamard Fractional Differential Equations”. Malaya Journal of Matematik 6, no. 01 (January 1, 2018): 28–33. Accessed July 16, 2024. https://www.malayajournal.org/index.php/mjm/article/view/767.