%0 Journal Article %A T. Šukilović %T Isometry groups of $4$-dimensional nilpotent Lie groups %J Fundamentalʹnaâ i prikladnaâ matematika %D 2015 %P 257-271 %V 20 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/FPM_2015_20_3_a12/ %G ru %F FPM_2015_20_3_a12