Richardson, C. H. (1963). An introduction to the calculus of finite differences. Princeton: D. Van Nostrad Company.
Παραπομπή Chicago StyleRichardson, C. H. An Introduction to the Calculus of Finite Differences. Princeton: D. Van Nostrad Company, 1963.
Παραπομπή MLARichardson, C. H. An Introduction to the Calculus of Finite Differences. Princeton: D. Van Nostrad Company, 1963.
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