On Lewis' exact invariant for the linear harmonic oscillator with time-dependent frequency
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1991 ◽
Vol 158
(3-4)
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pp. 181-182
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2006 ◽
Vol 39
(38)
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pp. 11825-11832
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2017 ◽
Vol 11
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pp. 263-273
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2003 ◽
Vol 17
(10)
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pp. 2045-2052
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