POKORNÝ, Jan. Environmental aspects of skiing.The conflicts of nature prevention and skiing in Czech Republic. In Proceedings of Mendelnet2005 - Contemporary state and development trends of forests in cultuiral lanbdscape. 2005th ed. Brno: Mendelova zemdlská a lesnická univerzita v Brn, 2005, p. 97-99. ISBN 80-7157-902-5.