@article {MR3719046,
	title = {A posteriori error estimates for the virtual element method},
	journal = {Numer. Math.},
	volume = {137},
	number = {4},
	year = {2017},
	pages = {857{\textendash}893},
	issn = {0029-599X},
	doi = {10.1007/s00211-017-0891-9},
	url = {https://doi.org/10.1007/s00211-017-0891-9},
	author = {Andrea Cangiani and E.H. Georgoulis and Pryer, Tristan and Sutton, Oliver J.}
}
