ŠMELKO, Štefan - MERGANIČ, Ján. Some methodological aspects of the National Forest Inventory and Monitoring in Slovakia. In Journal of forest science. ISSN 1212-4834, 2008, vol. 54, no. 10, p. 476-483. Dostupné na internete: <http://www.agriculturejournals.cz/publicFiles/02470.pdf>