KB method for obtaining an approximate solution of slowly varing amplitude and phase of nonlinear differential systems with varying coefficients
2020 ◽
Vol 5
(6)
◽
pp. 93-99
2021 ◽
Vol 44
(2)
◽
pp. 121-130
2018 ◽
Vol 15
(1)
◽
pp. 84-93
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