@article{Lewandowski2022,
  author    = {Max Lewandowski},
  title     = {Hadamard states for bosonic quantum field theory on globally hyperbolic spacetimes},
  journal   = {Journal of mathematical physics},
  volume    = {63},
  number    = {1},
  doi       = {10.1063/5.0055753},
  year      = {2022},
}