@unpublished{10_5802_jolt_1435,
     author = {Burde, Dietrich and Dekimpe, Karel},
     title = {The index of nilpotent {Lie} algebras},
     journal = {Journal of Lie Theory},
     publisher = {XXXX},
     doi = {10.5802/jolt.1435},
     language = {en},
     note = {Online first},
}