Least square method for Solving Linear Fredholm and Volterra Integro – Differential Equations of the Second Kind Using Bernstein Polynomial. cbej [Internet]. 2023 Jan. 21 [cited 2024 Jun. 30];18(73):121-6. Available from: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/9629