@article{JOLT_2015_25_3_a3,
     author = {Michael R. Hughes and Mihai D. Staic and Xiangdong Xie},
     title = {Classification of a {Class} of {Nonrigid} {Carnot} {Groups}},
     journal = {Journal of Lie Theory},
     pages = {717--732},
     year = {2015},
     volume = {25},
     number = {3},
     url = {http://geodesic.mathdoc.fr/item/JOLT_2015_25_3_a3/}
}