%0 Journal Article %A Teodor Atanacković %A Dragoslav Šumarac %T In memoriam: Nikola Hajdin (1923--2019) %J Theoretical and applied mechanics %D 2019 %V 46 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/TAM_2019_46_2_a0/ %F TAM_2019_46_2_a0