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Communicated by S. Bergman
This work was supported by the United States Air Force through the Office of Scientific Research and Development Command. Contract No. AF 49(638)-362. Proj. Nr. 812.
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Kreyszig, E. On regular and singular harmonic functions of three variables. Arch. Rational Mech. Anal. 4, 352–370 (1959). https://doi.org/10.1007/BF00281396
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DOI: https://doi.org/10.1007/BF00281396