%0 Journal Article %A Mohammad Sababheh %A Shiva Sheybani %A Hamid Reza Moradi %T Matrix Fejér and Levin-Stečkin Inequalities %J Kragujevac Journal of Mathematics %D 2025 %P 807 %V 49 %N 5 %U http://geodesic.mathdoc.fr/item/KJM_2025_49_5_a11/ %G en %F KJM_2025_49_5_a11