@misc{Przybylak_Rajmund_Poland's,
 author={Przybylak, Rajmund and Vizi, Zsuzsanna and Araźny, Andrzej and Kejna, Marek and Maszewski, Rafał and Uscka-Kowalkowska, Joanna},
 howpublished={online},
 title={Poland's climate extremes index, 1951-2005.},
}