MAŁEK, Stanisław - WEZYK, Piotr - NEROJ, Bozydar. The content of selected macro-elements in the litter fall (leaves and fruits) in the beech stand in the seed year of 1995 and barren zear of 1996 on the example of the "Chelmowa Gora" experimental plot in the Ojców National Park. In Folia forestalia polonica. - Polska Akademia Nauk : Warszawa. ISSN 0071-6677, 2001, z. 43, s. 5-20.