328934 Giacaglia, G. E. O. (1972). Perturbation methods in non-linear systems. New York : Springer-Verlag.
Chicago Style aipamena328934 Giacaglia, Giorgio E. O. Perturbation Methods in Non-linear Systems. New York : Springer-Verlag, 1972.
MLA aipamena328934 Giacaglia, Giorgio E. O. Perturbation Methods in Non-linear Systems. New York : Springer-Verlag, 1972.
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