@article{oai:repository.dl.itc.u-tokyo.ac.jp:00040019,
 author = {Baklouti, Ali and ElAloui, Nasreddine and Kédim, Imed},
 issue = {3},
 journal = {Journal of mathematical sciences, the University of Tokyo},
 month = {Oct},
 pages = {281--307},
 title = {A rigidity Theorem and a Stability Theorem for two-step nilpotent Lie groups},
 volume = {19},
 year = {2012}
}