1. F. Browder, Fixed point theory of multivalued mappings in topological vector space, Math.Ann. 197(1968), 283–301.
2. T. Dobrowolski, H. Tournczyk, On metric linear spaces homeomorphic to l2 and compact convex sets homeomorphic to Q, Bull. Acad.Po.Sci. 27(1979), 883–887.
3. M.Ehrlich, Über die Lösbarkeit einer nichtlinearen Integralgeichung in nicht lokalkonvexen Räumen, Math. Nachr.
4. D.H. Gregory, J.H. Shapiro, Nonconvex linear topologies with the Hahn Banach extension property, Proc. Amer. Math.Soc. 25(1970), 902–905.
5. O.Hadžić, The foundation of the fixed point theory, Dept. of Math. Novi Sad, 1978, 320 p.p. (Serbocroatian).