“…Many flavors of DG have been analyzed in terms of error estimates and convergence properties, and it is hard to do justice to the full scope of this work (the following papers provide an overview of pioneering and recents efforts in the analysis of DG methods: [28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52]).…”