Ekonomicko-matematické metody / Miroslav Rašovský . Brno :  Vysoká škola zemědělská , 1987 . 244 s . [1, of that borrowed 0]

The state of agricultural commodity markets 2018 : agricultural trade, climate change and food security . Rome :  Food and Agriculture Organization of the United Nations , 2018 . xv, 92 s . ISBN 978-92-5-130565-2
www.fao.org/3/I9542EN/i9542en.pdf . [1, of that borrowed 0]