Peterson, Nicolas. <br/><br/>
Demand sharing :   Reciprocity and the pressure for generosity among foragers. 

 - Washington, DC :   American Anthropological Association,   1993. 
 - p. 860-874 
 - trimestral 
 - Vol.95, no.4(Dec.1993) 
 - American Anthropologist ;   vol.95, no.4 .
 - Estados Unidos.   American Anthropological Association. .