@article{JOLT_2007_17_3_a10,
     author = {Kevin Bowman and David A. Towers and Vicente R. Varea},
     title = {On {Flags} and {Maximal} {Chains} of {Lower} {Modular} {Subalgebras} of {Lie} {Algebras}},
     journal = {Journal of Lie Theory},
     pages = {605--616},
     year = {2007},
     volume = {17},
     number = {3},
     url = {http://geodesic.mathdoc.fr/item/JOLT_2007_17_3_a10/}
}