About EULER N
About Rand Afrikaans Univ., Johannesburg, ZAF
About STEEB W-H
About Rand Afrikaans Univ., Johannesburg, ZAF
About CYRUS K
About Univ. Witwatersrand, Johannesburg, ZAF
About Journal of Physics. A. Mathematical and General
About anharmonic oscillation
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About 厳密解