From the viewpoint of semi-abelian homology, some recent results on homology of Leibniz $n$-algebras can be explained categorically. In parallel with these results, we develop an analogous theory for Lie $n$-algebras. We also consider the relative case: homology of Leibniz $n$-algebras relative to the subvariety of Lie $n$-algebras.
"Homology and central extensions of Leibniz and Lie n-algebras." Homology Homotopy Appl. 13 (1) 59 - 74, 2011.