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Relaxation Oscillations Governed by a Van Der Pol Equation with Periodic Forcing TermJ. Grasman, E. J. M. Veling and G. M. Willems · SIAM Journal on Applied Mathematics · 1976
Relaxation Oscillations Governed by a Van der Pol Equation with Periodic Forcing TermGrasman, J.; Veling, E. J. M.; Willems, G. M. · SIAM Journal on Applied Mathematics · 1976