@article{Gold2019,
  author    = {Roman Gold},
  title     = {Relativistic aspects of accreting supermassive black hole binaries in their natural habitat: a review},
  journal   = {Galaxies},
  volume    = {7},
  number    = {63},
  doi       = {10.3390/galaxies7020063},
  year      = {2019},
}