Brahim, Benali, Mohammed Tayeb Meftah, and Rai Vandana. “Green’s Function for A Piecewise Continous Potential via Integral Equations Method”. Journal of the Indonesian Mathematical Society 24, no. 2 (May 18, 2018): 20–35. Accessed August 8, 2022. https://jims-a.org/index.php/jimsa/article/view/387.