@article{JOLT_2019_29_1_a1,
     author = {H. Abels and E. B. Vinberg},
     title = {On {Free} {Two-Step} {Nilpotent} {Lie} {Semigroups} and {Inequalities} between {Random} {Variables}},
     journal = {Journal of Lie Theory},
     pages = {79--87},
     year = {2019},
     volume = {29},
     number = {1},
     zbl = {1415.22007},
     url = {http://geodesic.mathdoc.fr/item/JOLT_2019_29_1_a1/}
}