Tau Han, Cheong, Tay Kim Gaik, and Rosmila Abdul Kahar. 2016. “Nonlinear Equation Graphical User Interface Solver Using Excel VBA Programming”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC) 8 (2):59-63. https://jtec.utem.edu.my/jtec/article/view/958.