%0 Journal Article %A Xu, Na %A Tan, Ju %T Invariant harmonic unit vector fields on the oscillator groups %J Czechoslovak Mathematical Journal %D 2019 %P 907-924 %V 69 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.2019.0538-17/ %R 10.21136/CMJ.2019.0538-17 %G en %F 10_21136_CMJ_2019_0538_17