1. Fiacco, A. V., Private Correspondence, 1993.
2. Rockafellar, R. T.,Convex Analysis, Princeton University Press, Princeton, New Jersey, 1970.
3. Fiacco, A. V., andMcCormick, G. P.,Nonlinear Programming: Sequential Unconstrained Minimization Techniques, John Wiley and Sons, New York, New York, 1968.
4. Translations of Mathematical Monographs;E. G. Golstein,1972
5. Bazaraa, M. S., andShetty, G. M.,Nonlinear Programming: Theory and Algorithms, John Wiley and Sons, New York, New York, 1979.