“…Exact or approximate solution of integral equations has great importance because it has wide applications in scientific research. Many researchers (Golbabai and Keramati, 2008;Eslami, 2014a;Biazar et al, 2012;Biazar and Mostafa, 2011a, b;Rabbani et al, 2007;Maleknejad et al, 2007;Tahmasbi and Fard, 2008;Odibat, 2008;Maleknejad and Najafi, 2011;Biazar and Eslami, 2011;Eslami and Mirzazadeh, 2014;Eslami, 2014b;Biazar and Eslami, 2010a, b, c;2011) have solved various types of integral equations by several methods. Biazar et al (2008) solved system of Volterra integral equations of type (1) by HPM.…”