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The research of this author was partially supported by the U.S. Army Research Office—Durham, Grant DA-ARO-D-31-124-G1151.
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Pfaltzgraff, J.A., Pinchuk, B. A variational method for classes of meromorphic functions. J. Anal. Math. 24, 101–150 (1971). https://doi.org/10.1007/BF02790372
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DOI: https://doi.org/10.1007/BF02790372