@Article{ Dominguez-garcias_Pigolotti_MUÑOZ,

author = { Virginia Dominguez-garcias and Simone Pigolotti and MIGUEL ANGEL MUÑOZ MARTINEZ } ,

title = { Inherent directionality explains the lack of feedback loops in empirical networks },

journal = { Scientific Reports },

year = { 2014 },

volume = { 4 },

pages = { 7497- },

}