1. Department of Forest Ecology and Reclamation, Institute of Forest Ecology and Silviculture, Faculty of Forestry; University of Agriculture in Krakow; Al. 29 Listopada 46 31-425 Krakow Poland
2. Central Mining Institute; Plac Gwarków 1 40-166 Katowice Poland
3. Department of Organic Chemistry, Institute of Chemistry; University of Silesia; Szkolna 9 40-007 Katowice Poland