@incollection{KrollLudwigs2019,
  author    = {Kathrin Kroll-Ludwigs},
  title     = {Art. 7 Rome III-Regulation (formal validity)},
  booktitle = {Rome Regulations : commentary},
  edition   = {2nd ed.},
  editor    = {Gralf-Peter Colliess},
  isbn      = {9789041147547},
  year      = {2019},
}