@inbook {MR3790882, title = {Virtual element methods for elliptic problems on polygonal meshes}, booktitle = {Generalized barycentric coordinates in computer graphics and computational mechanics}, year = {2018}, pages = {263{\textendash}279}, publisher = {CRC Press, Boca Raton, FL}, organization = {CRC Press, Boca Raton, FL}, author = {Andrea Cangiani and Sutton, Oliver J. and Gyrya, Vitaliy and Manzini, Gianmarco} }