References
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- Gould , N.I.M. ( 1985 ) On practical conditions for the existence and uniqueness of solutions to the general equality quadratic programming problem. Mathematical Programming , 32 , 90 – 99 .
- Fletcher , R. ( 1987 ) Practical Methods of Optimization , 2nd Edn. , John Wiley , Chichester , UK .
- Gill , P.E. , Murray , W. and Wright , M.H. ( 1981 ) Practical Optimization. Academic Press , London .