1. Sobolev Spaces;Adams,1975
2. Numerical Continuation Methods. An Introduction;Allgower,1990
3. Fixed point equations and nonlinear eigenvalue problems in ordered Banach space;Amann;SIAM Rev.,1976
4. Survey lectures on the mathematical foundations of the finite element method;Babuška,1972
5. Eigenvalue problems;Babuška,1991