Continuation principles for coincidences

[1] A. Capietto, J. Mawhin, F. Zanolin, A continuation approach to superlinear periodic boundary value problems, J. Differential Equaitons, 88 (1990), 347-395.
[2] M. Furi, M.P. Pera, On the existence of an unbounded connected set of solutions for nonlinear equations in Banach spaces, Atti Accad. Naz. Lincei Rand. Sc. Fis. Mat. Natur., 67 (1979), 31-38.
[3] R.E. Gaines, J. Mawhin, Coincidence Degree and Nonlinear Differential Equaitons. Lecture Notes in Math. 568, Springer, Berlin, 1977.
[4] A. Granas, R.B. Guenther, J.W. Lee, Some general existence principles in the Caracterodory theory of nonlinear differential systems, J. Math. Pures Appl. 70 (1991), 153-196.
[5] W. Krawcewicz, Contribution a la theorie des equations non lineaires dans les espaces de Banach. Dissertationes Math. (Rozprawy Mat.) 263, 1988.
[6] J. Leray, I. Schauder, Topologie et equations fonctionnelles. Ann. Sci. Ecole Norm Sup. (3) 51 (1934), 45-78.
[7] R. Precup, A Granas type approach to some continuation theorems and periodic  boundary value problems with impulses. Topol. Methods Nonlinear Anal. 5 (1995), 385-396.
[8] R. Precup, Periodic solutions of superlinear singular ordinary differential equations. to appear.
[9] P. Volkann, Demonstration d’une theoreme de coincidence par la methode de Granas. Bull. Soc. Math. Belgique, Serie B, 36 (1984), 235-242.