Understanding hierarchies versus networks


Would anyone be able to point me to some resources for understanding the practical relationship and differences between hierarchies and networks?

I have read about hierarchies in integral theory and I know networks important too as an organizational structure in many domains. I’m trying to build a mental model for how we organize and use information for example in personal knowledge management and note-taking, where it is typically thought in terms of either one or the other, so I’m interested in exploring this from an integral perspective.