Gupta, P. (1996). Calculus of finite differences and numerical analysis (22nd.). Krishna.
Chicago-čujuhus (17. p.)Gupta, P. Calculus of Finite Differences and Numerical Analysis. 22nd. Meerut: Krishna, 1996.
MLA-čujuhus (9. p.)Gupta, P. Calculus of Finite Differences and Numerical Analysis. 22nd. Krishna, 1996.
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