@article{ASENS_1994_4_27_5_611_0,
     author = {Eberlein, Patrick},
     title = {Geometry of $2$-step nilpotent groups with a left invariant metric},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {611--660},
     publisher = {Elsevier},
     volume = {Ser. 4, 27},
     number = {5},
     year = {1994},
     doi = {10.24033/asens.1702},
     mrnumber = {95m:53059},
     zbl = {0820.53047},
     language = {en},
     url = {http://www.numdam.org/articles/10.24033/asens.1702/}
}