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The first part of this paper appeared in Monatsh. Math.75, 385–397 (1971).
Research supported by a NATO postdoctoral fellowship and National Science Foundation Grant No. GP-9564.
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Brualdi, R.A., Perfect, H. Extension of partial diagonals of matrices II. Monatshefte für Mathematik 76, 97–108 (1972). https://doi.org/10.1007/BF01298273
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DOI: https://doi.org/10.1007/BF01298273