@article{Dirac1953888,
  title   = "The lorentz transformation and absolute time",
  journal = "Physica",
  volume  = "19",
  number  = "1--12",
  pages   = "888--896",
  year    = "1953",
  doi     = "10.1016/S0031-8914(53)80099-6",
  author  = "P.A.M. Dirac"
}

@article{Feynman1963118,
  title   = "The theory of a general quantum system interacting with a linear dissipative system",
  journal = "Annals of Physics ",
  volume  = "24",
  pages   = "118--173",
  year    = "1963",
  doi     = "10.1016/0003-4916(63)90068-X",
  author  = "R.P Feynman and F.L {Vernon Jr.}"
}