Namdar, Nader, Mehdi Moradi, Yaghoub Mohmodian, Mehdi Sadegi Shahdani, and Roghayieh Hassanzadeh. 2021. “Developing a Mathematical Equation to Predict Khums and Zakat in the Iranian Economy”. International Journal of Zakat 6 (2):43-62. https://doi.org/10.37706/ijaz.v6i2.292.