Kuczyska, B., Puppel, K., Gobiewski, M., Metera, E., Sakowski, T., & Soniewski, K. (2012). Differences in whey protein content between cow's milk collected in late pasture and early indoor feeding season from conventional and organic farms in Poland. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE, 92(14), 2899-2904.

Kuczyska, B., K. Puppel, M. Gobiewski, E. Metera, T. Sakowski, and K. Soniewski. "Differences in Whey Protein Content Between Cow's Milk Collected in Late Pasture and Early Indoor Feeding Season from Conventional and Organic Farms in Poland." JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 92, no. 14 (2012): 2899-2904.

Kuczyska, B., et al. "Differences in Whey Protein Content Between Cow's Milk Collected in Late Pasture and Early Indoor Feeding Season from Conventional and Organic Farms in Poland." JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE, vol. 92, no. 14, 2012, pp. 2899-2904.