@article{Pastwa-Wojciechowska:2014,
  author  = "B. Pastwa-Wojciechowska and Z. Izdebski",
  title   = "Sexual activity of Polish adults",
  journal = "Annals of Agricultural and Environmental Medicine",
  volume  = "Vol. 21",
  number  = "No 1",
  pages   = "112--115",
  year    = "2014",
}