ŠÁLKA, Jaroslav - VINCA, Róbert - PÁLKOVÁ, M. Introduction of wood chips by the Regional State Forest Enterprise Levice. In Innovation and entrepreneurship in forestry in Central Europe : European Forest Institute research report. - Leiden : Koninklijke Brill NV, 2005. ISBN 90-04-14589-3. ISSN 1238-8785, p. 101-102.