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H.-P. Helfrich

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1995
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H.-P. Helfrich, D. Zwick:
Trust region algorithms for the nonlinear least distance problem. Numer. Algorithms 9(1): 171-179 (1995)
1993
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H.-P. Helfrich, D. Zwick:
A trust region method for implicit orthogonal distance regression. Numer. Algorithms 5(10): 535-545 (1993)

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