References
- Aubin , J.P. and CELLINA , A. 1984 . Differential inclusions , Spinger Verlag .
- BieleckI , A. 1956 . Une remarque sur I'application de la methode de Banach-Laccioppoli-Tikrenev dans la iheerie de l' equation s=f(x,y,z,p,q) . Bull.Acad.Polan.Sci , 4 : 265 – 268 .
- Borsuk , K. 1967 . Theory of remarks , PWN .
- Bryszewski , J. , GORNIEWICZ , L. and PRUSZKO , T. 1980 . An application of the logical degree theory is the study of the Darboux problem for hyperbolic equations . J. Math. Anal. Appl , 76 : 107 – 115 .
- De blast , F.S. and MYJAK , J. 1986 . On the structure of the set of solutions of the Darboux problem for hyperbolic equations . Proc. Edinburg Math. Soc , 29 : 7 – 14 .
- Gorniewicz , L. and PRUSZKO , T. 1980 . On the set of solutions of the Darboux problem for some hyperbolic equations . Bull. Acad. Polon. Sci , 28 : 279 – 285 .
- Lim , T.C. 1985 . On fixed point stability for set-valued contractive mappings with applications is generalized differential equations . J. Math. Anal. Appl , 110 : 436 – 441 .
- Michael , E. 1956 . Continuous selections I . Ann. of Math , 63 : 361 – 382 .
- Naselli ricceri , O. 1988 . A fixed points of multi-valued contractions . J. Math. Anal. Appl , 135 : 406 – 418 .
- Naselli ricceri , O. Classical solutions of the problem x’∈ ∈F(t,x,x’), x(t$sub:o$esub:)=x$sub:o$esub:, x’(t$sub:o$esub:)=y$sub:o$esub: in Banach spaces
- Ricceri , B. 1987 . Une propriate topologique de l'ensemble des points fixes d' une contraction multiveque a valeurs convexes . Atti Accad. Naz. Lincei Rend , 81 : 283 – 286 .
- Ricceri , B. 1988 . Fur les solutions classiques du probleme de Darboux pour certaines equations aux derivees partielles sous forme implicite dans les espaces de Banach . C.R. Acad. Sci. Paris , 307 : 325 – 328 .
- Rzepecki , B. 1986 . On the existance of solutions of the Darboux problem for the hyperbolic partial different equations in Banach spaces . Rend. Sem. Mat. Univ. Padova , 76 : 201 – 206 .
- Teodoru , G. 1986 . Sur le probleme de Darboux pour l'equation ∂2z/∂x∂y∈ ∈F(x,y,z) . An. Stiint. Univ , 32 : 41 – 49 .