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2. Bulirsch, R.: Die Mehrzielmethode zur numerischen Lösung von nichtlinearen Randwerproblemen und Aufgaben der optimalen Steuerung. Report Carl-Cranz-Gesellschaft, 1971
3. Dennis, J.E., Moré, J.J.: A characterization of superlinear convergence and its application to quasi-Newton methods. Math. Comput.28, 549?560 (1974)
4. Dennis, J.E., Schnabel, R.B.: Numerical methods for nonlinear equations and unconstrained optimization 1st, Ed. Englewood Cliffs, NJ Prentice-Hall 1983
5. Dennis, J.E., Walker, H.F.: Convergence theorems for least change secant update methods. SIAM J. Numer. Anal.3, 949?987 (1981)