@ARTICLE{_Introduction_2020,
 number={No 277},
 journal={Biuletyn KPZK},
 howpublished={online},
 year={2020},
 publisher={PAN, Komitet Przestrzennego Zagospodarowania Kraju},
 type={Introduction},
 title={Introduction},
 URL={http://journals.pan.pl/Content/124850/PDF/Biuletyn%20277-2-Wstep.pdf},
}