M.Imanova, M. , G.Mehdiyeva, G. , V.Ibrahimov, V. (2010). 'Research of a Multistep Method Applied to Numerical Solution of Volterra Integro-Differential Equation'. World Academy of Science, Engineering and Technology, Open Science Index 45, International Journal of Mathematical and Computational Sciences, 4(9), 1261 - 1264.