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Applicability of nonlinear optimization in decision support systems : the development of a flexible optimizer
Kribbe, Wilhelmina J., (1987)
Variable addition and Lagrange multiplier tests for linear and logarithmic regression models : theory and Monte Carlo evidence
Godfrey, L. G., (1986)
Integer resource allocations with the objective function separable into pairs of variables
Zeitlin, Zeev, (1981)