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3. K.A. Michalski, Bibliography of the singularity expansion method and related topics, Electromagnetics, 493–511 (1981).
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5. C.E. Baum, The singularity expansion method, in: Transient Electromagnetic Fields, edited by L.B. Felsen (Springer-Verlag, New York, 1976), Ch. 3, pp. 129–179.