@article{MAN_1988__282_2_164476,
     author = {Helmut Strade and Rolf Farnsteiner},
     title = {On the {Derived} {Length} of {Solvable} {Lie} {Algebras.}},
     journal = {Mathematische Annalen},
     pages = {503--512},
     publisher = {mathdoc},
     volume = {282},
     number = {2},
     year = {1988},
     zbl = {0663.17007},
     url = {http://geodesic.mathdoc.fr/item/MAN_1988__282_2_164476/}
}