@incollection{GreweZachow2017, author = {Carl Martin Grewe and Stefan Zachow}, title = {Face to Face-Interface}, booktitle = {+ultra. Knowledge \& Gestaltung}, editor = {Nikola Doll and Horst Bredekamp and Wolfgang Sch{\"a}ffner}, pages = {320 -- 321}, year = {2017}, }