Stefan Hey 1 Stefan-500x500.jpg2 image/jpeg Type image/jpeg Dimension Dimension 500x500 Size File size 142.2 KB Download2 View full-size image1 Linkshttps://www.inres.uni-bonn.de/cfg/en/medien/alumni/stefan-500x500.jpg/image_view_fullscreenhttps://www.inres.uni-bonn.de/cfg/en/medien/alumni/stefan-500x500.jpg/@@download/image/Stefan-500x500.jpg