%0 Journal Article %A Wu, Yansheng %A Tang, Gaohua %A Deng, Guixin %A Zhou, Yiqiang %T Nil-clean and unit-regular elements in certain subrings of ${\mathbb M}_2(\mathbb Z)$ %J Czechoslovak Mathematical Journal %D 2019 %P 197-205 %V 69 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.2018.0256-17/ %R 10.21136/CMJ.2018.0256-17 %G en %F 10_21136_CMJ_2018_0256_17