References
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- Algebra T.W.Hungerford
- Algebra v.28 no.7 Ideals of some matrix rings,Comm F.Kuzucuoglu;V.M.Levchuk https://doi.org/10.1080/00927870008827036
- Algebra and logic v.15 no.5 Relation of the unitriangular group to certain rings V.M.Levchuk https://doi.org/10.1007/BF02069108
- Math. Zametki v.42 no.8 Some locally nilpotent rings and adjoint groups