%0 Journal Article %A Dragomir, Silvestru Sever %T Some Hermite–Hadamard type inequalities for the square norm in Hilbert spaces %J Annales Universitatis Mariae Curie-Skłodowska. Mathematica %D 2021 %P 31-44 %V 75 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/AUM_2021_75_2_a2/ %G en %F AUM_2021_75_2_a2