GRYKIEŃ, Stanislaw. The meaning of forest management in the Klodzko district economy in the context of common agriculture policy. In Regional development and planning. 1. vyd. 146 s. ISBN 978-80-7414-222-2 (brož.) Regional Development and Planning. Ústí nad Labem : Jan Evangelista Purkyně University, 2010, s. 25-33.