@article{ZimmermannJauer2021,
  author    = {Andreas Zimmermann and Nora Jauer},
  title     = {Legal shades of grey?},
  journal   = {Archiv des V{\"o}lkerrechts},
  series    = {indirect legal effects of 'Memoranda of Understanding'},
  volume    = {59},
  number    = {3},
  pages     = {278 -- 299},
  doi       = {10.1628/avr-2021-0016},
  year      = {2021},
}