1. A new technique for correcting satellite ephemeris errors indirectly observed from radar altimetry;Cloutier,1981
2. The conjugate gradient method for solving linear systems;Hestenes;Numer. Anal. Proc. Symp. Appl. Math.,1956
3. Luenberger, D., , Introduction to Linear and Nonlinear Programming, Addison-Wesley, Menlo Park, Calif., 1973,
4. Sequential gradient-restoration algorithm for the minimization of constrained functions—ordinary and conjugate gradient versions;Miele;J. Optimization Theory Appl.,1969
5. Ortega, J. M., , W. C., Rheinboldt, , Iterative Salutions of Nonlinear Equations in Several Variables, Academic, New York, 1970,