The hypercentral structure of the group of unitriangular automorphisms of a free metabelian Lie algebra. Kabanov, A.N. — 2009 Sibirskij Matematicheskij Zhurnal
Strictly nontame primitive elements of the free metabelian Lie algebra of rank 3. Kabanov, A.N.; Roman'kov, V.A. — 2009 Sibirskij Matematicheskij Zhurnal