Ralph Kieft
- Curved directly glazed steel structure. Dans: Steel Construction, v. 9, n. 4 (novembre 2016). (2016):
- (2017): Bicycle and Pedestrian Bridge Sittard-Geleen. Présenté pendant: Footbridge 2017 Berlin - Tell A Story, 6-8.9.2017, Technische Universität Berlin (TU Berlin).