Gudaj, Richard. „The Behaviour of Cows in Response to Rubber Mats in Milking Parlour Stalls“. Animal Welfare, Etológia és Tartástechnológia (AWETH), Bd. 5, Nr. 3, September 2009, S. 231-53, https://journal.uni-mate.hu/index.php/aweth/article/view/6852.