Kamali, Mohamed Ali, and Péter Horn. 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 I. Heterosis in Egg Production in the Original Populations After Few Generations of RRS Selection”. Acta Agraria Kaposváriensis 5 (2): 23-30. https://journal.uni-mate.hu/index.php/aak/article/view/1573.