Ralf Birken
- Understanding and Detecting Bridge Deck Deterioration with Ground-Penetrating Radar. Dans: Transportation Research Record: Journal of the Transportation Research Board, v. 2313, n. 1 (janvier 2012). (2012):
- City-Wide Application of the Affordable and Rapid StreetScan Pavement-Management System. Dans: Journal of Infrastructure Systems, v. 23, n. 2 (juin 2017). (2017):