@article{Norman2011,
  author    = {John R. Norman},
  title     = {A synopsis of the rays of the family Rhinobatidae : with a revision of the genus Rhinobatus},
  journal   = {Proceedings of the Zoological Society of London},
  volume    = {1926},
  number    = {62},
  pages     = {941 -- 982},
  year      = {2011},
}