@misc{Baraniak_Edward_Ocena,
 author={Baraniak, Edward and Stachowiak, Paweł},
 howpublished={online},
 title={Ocena zdrowotności i stanu sanitarnego drzewostanów Wielkopolskiego Parku Narodowego.},
 title={Evaluation of the health and sanitary condition of stands of the Great Poland National Park.},
}