The fact that urls cited in publications no longer work over time is why I often included their content as apendix's to my essays. That way even if the original

The fact that urls cited in publications no longer work over time is why I often included their content as apendix's to my essays. That way even if the original source is lost the referenced material isn't. Then again material published in journals and books is greater than material published on the internet, if for nothing other than it can be relied upon to be found in decades to come.