[1m[4m[31mReferences[0m [33m[CS06] [0m[1m[31mCatino, F. and Spinelli, E. [0m, [34mLie nilpotent group algebras and upper Lie codimension subgroups[0m, Comm. Algebra, [34m34[0m (10) (2006), 3859--3873 [33m[D92] [0m[1m[31mDu, X. K. [0m, [34mThe centers of a radical ring[0m, Canad. Math. Bull., [34m35[0m (2) (1992), 174-179 [33m[HB82] [0m[1m[31mHuppert, B. and Blackburn, N. [0m, [34mFinite groups. II[0m, Springer-Verlag, Grundlehren der Mathematischen Wissenschaften [Fundamental Principles of Mathematical Sciences], [34m242[0m, Berlin (1982), xiii+531, (, AMD, 44) [33m[LR86] [0m[1m[31mLevin, F. and Rosenberger, G. [0m, [34mLie metabelian group rings[0m, in [34mGroup and semigroup rings (Johannesburg, 1985)[0m, North-Holland, North-Holland Math. Stud., [34m126[0m, Amsterdam (1986), 153--161 [33m[PPS73] [0m[1m[31mPassi, I. B. S. and Passman, D. S. and Sehgal, S. K. [0m, [34mLie solvable group rings[0m, Canad. J. Math., [34m25[0m (1973), 748--757 [33m[R97] [0m[1m[31mRossmanith, R. [0m, [34mCentre-by-metabelian group algebras[0m, Friedrich-Schiller-Universit\accent127at Jena (1997) [33m[R00] [0m[1m[31mRossmanith, R. [0m, [34mLie centre-by-metabelian group algebras in even characteristic. I, II[0m, Israel J. Math., [34m115[0m (2000), 51--75, 77--99 [33m[R02] [0m[1m[31mRossmanith, R. [0m, [34mLie centre-by-metabelian group algebras over commutative rings[0m, J. Algebra, [34m251[0m (2) (2002), 503--508 [33m[S91] [0m[1m[31mShalev, A. [0m, [34mLie dimension subgroups, Lie nilpotency indices, and the exponent of the group of normalized units[0m, J. London Math. Soc. (2), [34m43[0m (1) (1991), 23--36 [33m[S94] [0m[1m[31mSims, C. C. [0m, [34mComputation with finitely presented groups[0m, Cambridge University Press, Encyclopedia of Mathematics and its Applications, [34m48[0m, Cambridge (1994), xiii+604 [33m[W93] [0m[1m[31mWursthorn, M. [0m, [34mIsomorphisms of modular group algebras: an algorithm and its application to groups of order $2\sp 6$[0m, J. Symbolic Comput., [34m15[0m (2) (1993), 211--227 -------------------------------------------------------