ELOBIED, G. H. et al.
 Effect of production systems on the performance of dairy cows in the Gezira State, Sudan.
<strong>Gezira Journal of Agricultural Science</strong>, [S.l.], v. 15, n. 2, dec. 2017.
ISSN 1728-9556. Available at: &lt;<a href="http://37.60.236.48/index.php/gjas/article/view/981" target="_new">http://37.60.236.48/index.php/gjas/article/view/981</a>&gt;. Date accessed: 03 june 2026.