Dash, P., F. T. Zohora, M. Rahaman, M. M. Hasan, and M. Arifuzzaman. “Usage of Mathematics Tools With Example in Electrical and Electronic Engineering”. American Scientific Research Journal for Engineering, Technology, and Sciences, vol. 46, no. 1, Sept. 2018, pp. 178-8, https://asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/4335.