1. Multi - valued contraction mappings;Nadler;Math,1969
2. note on tvs - cone metric fixed point theory Modelling;Radenović;Math Comput,2011
3. Multi - valued contraction mappings;Nadler;Math,1969
4. - On a general class of multi - valued weakly mappings;Berinde;Math Anal Appl,2007
5. Pre sić On c type generalization of the Banach contraction mapping principle;Ćirić;Acta Math,2007