To be, or not to be 'urban'? A multi-modal method for the differentiated measurement of the degree of urbanization. - Hannes Taubenböck; Ariane Droin; Ines Standfuß; Fabian Dosch; Nikola Sander; A. Milbert; Silas Eichfuss; Michael Wurm (Comput. Environ. Urban Syst., 2022)