@article{10_4153_CJM_2006_029_9,
     author = {Bendikov, A. and Saloff-Coste, L.},
     title = {Hypoelliptic {Bi-Invariant} {Laplacians} on {Infinite} {Dimensional} {Compact} {Groups}},
     journal = {Canadian journal of mathematics},
     pages = {691--725},
     year = {2006},
     volume = {58},
     number = {4},
     doi = {10.4153/CJM-2006-029-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2006-029-9/}
}