Robison, Schmid, and Siles (2002) reviewed various definitions of social capital and concluded that many did not satisfy the formal requirement of a definition.
Robison, Schmid d Siles (2002) olas isteɣrad n almaɣna tan ajjotnen n social capital tolas akkimal majrad net s as war i ajjotnen war olahan id izilzam win almaɣna