CJEU landmark decision in the case Breyer v. Federal Republic of Germany (decision dated 19 October 2016, case number C-582/14).
DLA Piper analysis
David Vasella
http://datenrecht.ch/bgh-i-s-breyer-vi-zr-13513-16-5-17-personenbezug-dynamischer-ip-adressen/
IAPP article