@article{Borucińska-Bieńkowska:2013,
  author  = "H. Borucińska-Bieńkowska",
  title   = "The directions of protection and development of natural environment of a metropolis on the example of the Poznań metropolitan area",
  journal = "Civil and Environmental Engineering Reports",
  volume  = "No. 10",
  pages   = "19--32",
  year    = "2013",
  note    = "University of Zielona Góra Press, Zielona Góra",
}