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3. Allgower, E. L. and Chien, C.-S.: Continuation and local perturbation for multiple bifurcations, SIAM J. Sci. Stat. Comput.7, 1265–1281 (1986)
4. Allgower, E. L., Chien, C.-S. and Georg, K.: Large sparse continuation problems,J. Comp. Appl. Math. 26, 3–22(1989)
5. Allgower, E. L., Georg, K. and Miranda, R.: Calculating all real solutions of polynomial equations via elimination and continuation, Preprint Colorado State University, Fort Collins, CO. 1990