@article{MakhmudoMakhmudovTarkhanov2011,
  author    = {K. O. Makhmudo and O. I. Makhmudov and Nikolai Nikolaevich Tarkhanov},
  title     = {Equations of Maxwell type},
  journal   = {Journal of mathematical analysis and applications},
  volume    = {378},
  number    = {1},
  pages     = {64 -- 75},
  doi       = {10.1016/j.jmaa.2011.01.012},
  year      = {2011},
}