@article{Maciejewski:2017,
  author  = "A. Maciejewski",
  title   = "A novel approach to the spectral problem in the two photon Rabi model",
  journal = "Journal of Physics A : Mathematical and Theoretical",
  volume  = "Vol. 50",
  number  = "no. 24",
  pages   = "1--22",
  year    = "2017",
}