René Heller
- (2013): Engineering challenges from assessment of Schalkwijksebrug. Vorgetragen bei: IABSE Conference: Assessment, Upgrading and Refurbishment of Infrastructures, Rotterdam, The Netherlands, 6-8 May 2013.
- (2013): Rehabilitation strategies for steel and movable bridges in Rotterdam. Vorgetragen bei: IABSE Conference: Assessment, Upgrading and Refurbishment of Infrastructures, Rotterdam, The Netherlands, 6-8 May 2013.