Threatened weedy plant species : book of proceedings from the international scientific conference, Nitra, September 20-21, 2005 / [editor: Pavol Eliáš jun. ; authors: Tibor Baranec ... [et al.]] . Nitra :  Slovak University of Agriculture , 2007 . 86 s . ISBN 978-80-8069-949-9 . [1, z toho požičaných 0]