KOCIRA, Slawomir et al. Efficiency of material and energy expenditure and the direction of farms production. In Farm machinery and processes management in sustainable agriculture - FMPMSA. 1st ed. 451 s. ISBN 978-83-66017-74-0. Farm machinery and processes management in sustainable agriculture. Radom : Instytut Naukowo-wydawniczy "Spatium", 2019, s. 365-369. Dostupné na internete:<https://depot.ceon.pl/handle/123456789/17745>