Barthel.jpg https://www.mathematics.uni-bonn.de/en/people/pictures/barthel.jpg/view https://www.mathematics.uni-bonn.de/en/people/pictures/barthel.jpg/@@images/image-1200-7bfb799ca633d7fa22791819d4dfa823.jpeg Barthel.jpg Barthel.jpg image/jpeg Type image/jpeg Dimension Dimension 1679x2268 Size File size 1.6 MB Download View full-size image
