The Strad Magazine has published Nils’ exercises for bow technique in their print edition (paywall article), you can see an excerpt HERE.
Nils also just appeared at NDR TV in the broadcast “DAS!”, where he was talking about the challenges during the lockdown, his new language skills, his connection to jazz and many more topics. You can watch the video til the 20th of May.
Joachim Mischke from the Hamburger Abendblatt also interviewed him for their classical music podcast. Listen or read it HERE. (both in German)