@article{AIHPB_2005__41_3_257_0,
     author = {Parthasarathy, K. R.},
     title = {Extremal quantum states in coupled systems},
     journal = {Annales de l'I.H.P. Probabilit\'es et statistiques},
     pages = {257--268},
     publisher = {Elsevier},
     volume = {41},
     number = {3},
     year = {2005},
     doi = {10.1016/j.anihpb.2003.10.009},
     mrnumber = {2139019},
     zbl = {1074.81045},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1016/j.anihpb.2003.10.009/}
}