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R. Floyd, J. Math. Phys.
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2. E.
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3. A preliminary development of this expansion was
given in AIP document No. PAPS 760128‐01 (associated with Ref. 1) on pages
16–17.
4. N.
Fröman, Arkiv Fysik
32, 541 (1966).AFYSA70365-2440