@incollection{KrollLudwigs2015,
  author    = {Kroll-Ludwigs, Kathrin},
  title     = {Art. 5 Rom III-Regulation (choice of applicable law by the parties)},
  series = {Rome Regulations : commentary},
  booktitle = {Rome Regulations : commentary},
  editor    = {Calliess, Gralf-Peter},
  edition   = {2nd ed.},
  publisher = {Wolters Kluwer},
  isbn      = {9789041147547},
  year      = {2015},
  language  = {en}
}
@incollection{KrollLudwigs2015,
  author    = {Kroll-Ludwigs, Kathrin},
  title     = {Art. 7 Rome III-Regulation (formal validity)},
  series = {Rome Regulations : commentary},
  booktitle = {Rome Regulations : commentary},
  editor    = {Colliess, Gralf-Peter},
  edition   = {2nd ed.},
  publisher = {Wolters Kluwer},
  isbn      = {9789041147547},
  year      = {2015},
  language  = {en}
}