“Influence of protein supplementation frequency on cows consuming low-quality forage: Performance, grazing behavior, and variation in supplement intake”
, Journal of Animal Science
, vol. 83615479707249818080436630556812679167173B-15266715774574767167SR-760438126786015B-102571785939, no. 7, pp. 1715 - 1725, 2005.
“The influence of public open space on urban spatial structure”
, Journal of Environmental Economics and Management
, vol. 46, pp. 288–309, 2003.