Liu, Yuji. “Existence of Solutions of Multi-Term Fractional Differential Equations With Impulse Effects on a Half Line”. Nonlinear Analysis: Modelling and Control 22, no. 5 (September 24, 2017): 679–701. Accessed May 21, 2024. https://www.journals.vu.lt/nonlinear-analysis/article/view/13373.