SuperSonntag, Interview Prof Ferrein
Prof Ferrein was interviewed by the weekly newspaper "SuperSonntag".
You can find an online version here: http://epaper.supersonntag.de/2.0/#/read/ssf0/20180429?page=0&article=400930457 and http://epaper.supersonntag.de/2.0/#/read/ssf0/20180429?page=15&article=400930434
Offline copies of the interview can be found here as well. Interview part one on front page Interview part two in the inner section