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This research was supported in part by a grant from the National Science Foundation to the University of Maryland; MPS 75-07387. The computer time used was supported in full by the Computer Science Center, University of Maryland.
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Hummel, J.A. A variational method for Gel’fer functions. J. Anal. Math. 30, 271–280 (1976). https://doi.org/10.1007/BF02786718
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DOI: https://doi.org/10.1007/BF02786718