ŠÁLKA, Jaroslav - DOBŠINSKÁ, Zuzana. Policy analysis for assuring forest ecosystem externalities. Rec. Mikuláš Šupín, Zuzana Sarvašová. 1. ed. Zvolen : Technical University in Zvolen, 2013. 120 p. ITMS 26110230037. ISBN 978-80-228-2471-2.