[1] E. Babolian, K. Maleknejad, M. Roodaki and H. Almasieh, Two-dimensional triangular functions and thire applications to nonlinear 2D Volterra-fredholm integral equations, Computers and Mathematics with Applications, 60 (2010), 1711–1722.
[2] B. A. Bel’ tyukov and L. N. Kuznechikhina, A Rung-Kutta method for solution of two-dimensional nonlinear Volterra integral equations, Differential Equations, 12 (1976) 1169–1173.
[3] H. Brunner and J.P. Kauthen, The numerical solution of two-dimensional Volterra integral equations by collocation and iterated collocation, IMA Journal of Numerical Analysis, 9 (1989) 47–59.
[4] H. Guoqiang, K. Hayami, K. Sugihara and W. Jiong, Extrapolation method of iterated collocation solution for
two-dimensional nonlinear Volterra integral equa-tion, Applied Mathematics and Computation, 112 (2000) 49–61.
[5] M. Hadizadeh and N. Moatamedi, A new differential transformation approach for two-dimensional Volterra integral equations, International Journal of Computer Mathematics, 84 (2007) 515–529.
[6] G.Q. Han and L.Q. Zhang, Asymptotic error expansion of two-dimensional Volterra integral equation by iterated collocation, Applied Mathematics and Com-putation, 61 (1994) 269–285.
[7] R. Hanson and J. Phillips, Numerical solution of two-dimensional integral equa-tions using linear elements, SAIM Journal on Numerical Analysis, 15 (1978)113–121.
[8] Z. H. Jiang and W. Schaufelberger, Block Pulse functions and their applications in control systems, Spriger-Verlag, Berlin (1992).
[9] K. Maleknejad and B. Rahimi,Modification of block pulse functions and their application to solve numericaliy Volterra integral equation of the first kind,Com-munications in Nonlinear Science and Numerical Simulation,16(2011)2469–2477.
[10] K. Maleknejad, S. Sohrabi and B. Baranji, Application of 2D-BPFs to nonlinear integral equations, Communications in Nonlinear Science and Numerical Simula-tion, 15 (2010) 527–535.
[11] S. Mckee, T. Tang and T. Diago, An Euler-type method for two-dimensional Volterra integral equations of the first kind, IMA Journal of Numerical Analysis,20 (2000) 423–440.
[12] F. Mirzaee and E. Hadadiyan, Approximate solutions for mixed nonlinear Volterra-Fredholm type integral equations via modified block-pulse functions, Journal of the Association of Arab Universities for Basic and Applied Sciences,
12 (2012) 65–73.
[13] F. Mirzaee and Z. Rafei, The block by block method for the numerical solution of the nonlinear two-dimensional Volterra integral equations, Journal of King Saud University Science, 23 (2011) 191–195.
[14] W. Rudin, Principles of mathematical analysis, Singapore: McGraw-Hill, (1976).
[15] P. Singh, A note on the solution of two-dimensional Volterra integral equations by spline, Indian Journal of Mathematics, 18 (1979) 61–64.
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