Świątkiewic, Sylwester, Jerzy Koreleski, and Anna Arczewska-Włosek. 2010. “Egg Performance, Egg Quality, and Nutrient Utilization in Laying Hens Fed Diets With Different Levels of Rapeseed Expeller Cake”. Agricultural and Food Science 19 (3):233-39. https://doi.org/10.2137/145960610792912594.