%0 Journal Article %A Shao, Yanling %A Gao, Yubin %A Gao, Wei %T $\mathcal {D}_{n,r}$ is not potentially nilpotent for $n \geq 4r-2$ %J Czechoslovak Mathematical Journal %D 2016 %P 671-679 %V 66 %N 3 %I mathdoc %U https://geodesic-test.mathdoc.fr/articles/10.1007/s10587-016-0285-7/ %R 10.1007/s10587-016-0285-7 %G en %F 10_1007_s10587_016_0285_7