Szabó, Csaba, László Babinszky, and János Tossenberger. 2002. “Nutritional Possibilities to Reduce the N and P Excretion of Pigs: A Review”. Acta Agraria Kaposváriensis 6 (2): 35-41. https://journal.uni-mate.hu/index.php/aak/article/view/1617.