no. 3
Extremal quantum states in coupled systems
Annales de l'I.H.P. Probabilités et statistiques, Tome 41 (2005) no. 3, pp. 257-268. 
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     title = {Extremal quantum states in coupled systems},
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Parthasarathy, K. R. Extremal quantum states in coupled systems. Annales de l'I.H.P. Probabilités et statistiques, Tome 41 (2005) no. 3, pp. 257-268. doi : 10.1016/j.anihpb.2003.10.009. http://www.numdam.org/articles/10.1016/j.anihpb.2003.10.009/

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