@article{Szumiński:2018,
  author  = "W. Szumiński",
  title   = "Integrability analysis of chaotic and hyperchaotic finance systems",
  journal = "Nonlinear Dynamics",
  volume  = "Vol. 94",
  number  = "no. 1",
  pages   = "443--459",
  year    = "2018",
}