Gholamreza ZAMANI ESKANDANI , Soheila AZARMI , Masoumeh RAEISI . PRODUCTS OF RESOLVENTS AND MULTIVALUED HYBRID MAPPINGS IN CAT(0) SPACES[J]. Acta mathematica scientia, Series B, 2018 , 38(3) : 791 -804 . DOI: 10.1016/S0252-9602(18)30784-7

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