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Solving non-linear systems by computer : a new method
Giessen, A. A. van der, (1970)
Variable addition and Lagrange multiplier tests for linear and logarithmic regression models : theory and Monte Carlo evidence
Godfrey, L. G., (1986)
Applicability of nonlinear optimization in decision support systems : the development of a flexible optimizer
Kribbe, Wilhelmina J., (1987)
On parametric linear and quadratic programming problems
Ritter, Klaus, (1984)
Europäische Friedensordnung als Entwicklungsproblem der weltpolitischen Infrastruktur
Ritter, Klaus, (1970)
A method of conjugate directions for unconstrained minimization
Ritter, Klaus, (1972)