Mausse, Francisco, Japhet R. Lyaku, and Theopoline Omagano Itenge. 2018. “ Mineral Mobilization and Respective Incorporation into the Egg Yolk of Lohmann Brown Egg Layer Chickens Given Purified Lignin at the Neudamm Farm in Namibia”. International Science and Technology Journal of Namibia, January, 074-084. https://journals.unam.edu.na/index.php/ISTJN/article/view/1208.