Bellman, R. (1964). Perturbation Techniques in Mathematics, Physics, and Engineering. Holt, Rinehart and Winston.
Citace podle Chicago (17th ed.)Bellman, Richard. Perturbation Techniques in Mathematics, Physics, and Engineering. Nueva York: Holt, Rinehart and Winston, 1964.
Citace podle MLA (9th ed.)Bellman, Richard. Perturbation Techniques in Mathematics, Physics, and Engineering. Holt, Rinehart and Winston, 1964.
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