@book{sedov1987,
  address = {Moscow},
  author  = {Sedov, V. V. (ed. ).},
  key     = {Sedov (1987)},
  title   = {Finno-ugry i balty v epohu srednevekov'ja (Finno-Ugric and Baltic Peoples in the Medieval Epoch)},
  year    = {1987}
}