References
- Brunovsky , P. and Chow , S.N. 1984 . Generic properties of stationary state solutions of reaction-diffusion equations . J. Diff. Eg , 53 : 1 – 23 .
- Chow , S. N. and Hale , J. K. 1982 . Methods of Bifurcation Theory , New York : Springer-Verlag .
- Hale , J. K. 1980 . Ordinary Differential Equations , Malabar, FL : Robert E. Krieger Publishing Co., Inc .
- Hausrath , A. R. and Manasevich , R. F. 1986 . The characterization of degenerate and non-degenerate systems . Rockv Mount. J. Math , 16 : 203 – 214 .
- Hausrath , A. R. and Manasevich , R. F. Periodic solutions of periodically forced non-degenerate systems . Rockv Mount. J. Math , to appear
- Hausrath , A.R. , Manasevich , R.F. and Murua , A. 1987 . The degree of a continuous periodic map of the cube is zero , Universidad de Chile Technical Report .
- Istratescu , V. I. 1981 . fixed Point Theory, Ah Introduction , Dordrecht, , Holland : D. Reidel Publishing Co .
- Lazer , A. C. 1973 . Small periodic perturbations of a class of conservative systems . J. Diff. Ea , 13 : 438 – 456 .