@article{AIHPB_2013__49_1_270_0,
     author = {Thompson, Russ},
     title = {The rate of escape for random walks on polycyclic and metabelian groups},
     journal = {Annales de l'I.H.P. Probabilit\'es et statistiques},
     pages = {270--287},
     publisher = {Gauthier-Villars},
     volume = {49},
     number = {1},
     year = {2013},
     doi = {10.1214/11-AIHP455},
     mrnumber = {3060157},
     zbl = {1274.60018},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1214/11-AIHP455/}
}