Influence of estrus to changes in the rumination and locomotion activity of heifers and dairy cows / Mária Rušinová ...[et al.]. In: Innovative researches for the future of agriculture and rural areas development. -- 1st ed.. -- 156 s. Innovative researches for the future of agriculture and rural areas development. -- Bydgoszcz : University of Technology and Life Sciences Press, 2016. -- S. 116. prežúvavce * dojnice * pohyb živočíchov * ruja