Passage of feed in dairy cows : use of stable isotopes to estimate passage kinetics through the digestive tract of dairy cows / Daniel Warner . Wageningen :  Wageningen University , 2013 . 163 s . Doktorandská dizertačná práca (PhD.). - Wageningen University . ISBN 978-94-6173-683-3 . [1, z toho požičaných 0]