@article{Kułyk:2017,
  author  = "P. Kułyk and Ł. Augustowski",
  title   = "Convergence of health expenditure in EU 12 and V4 states",
  journal = "Copernican Journal of Finance & Accounting",
  volume  = "Vol. 6",
  number  = "no. 2",
  pages   = "33--43",
  year    = "2017",
}