NASA technical note TN (series). D-3441. Application of unitary transformations to 4th order perturbation theory [with lists of references]; by J. L. M. Cortez.
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Application of unitary transformations to 4th order perturbation theory [with lists of references]; by J. L. M. Cortez.
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NASA technical note TN (series). D-3441. Application of unitary transformations to 4th order perturbation theory [with lists of references]; by J. L. M. Cortez.