Kamali, M. A., Böröcz, Z., Sütő, Z., & Horn, P. (2001). Heterosis in egg production in different parts of the laying period of layers of Rhode Island Red origin selected by RRS selection in two environments Part II.: Heterosis in hen day egg production in populations under long term RRS selection. Acta Agraria Kaposváriensis, 5(2), 31-36. https://journal.uni-mate.hu/index.php/aak/article/view/1575