[1] Guo Dajun and V. Lakshmikantham, Multiple solutions of two-point boundary value problems of ordinary differential equations in Banach spaces, J. Math. Anal. Appl., 129(1988), 211-222.
[2] Song Fuming, On the solutions of two-point boundary value problems in Banach space, Chinese Math. Ann., 14A, 6(1993), 692-697. (in Chinese)
[3] Guo Dajun, Nonlinear Functional Analysis. Shandong Sci. and Tech. Publishing House (1985). (in Chinese)
[4] K. Deimling, Nonlinear Functional Analysis, Springer-Verlag. Berlin (1980.
[5] K. Yoside, Functional Analysis. Fifth Edition. Springer-Verlag, Berlin(1978). |