@article{VMUMM_1986_2_a15,
     author = {A. A. Zolotykh},
     title = {$4$ {-Engel} {Lie} algebras},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {79--81},
     publisher = {mathdoc},
     number = {2},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1986_2_a15/}
}