How Chaotic is a State of a Quantum System ?
Les rencontres physiciens-mathématiciens de Strasbourg -RCP25, Tome 17 (1973), Exposé no. 3, 24 p. 
@article{RCP25_1973__17__A3_0,
     author = {Wehrl, A.},
     title = {How {Chaotic} is a {State} of a {Quantum} {System} ?},
     journal = {Les rencontres physiciens-math\'ematiciens de Strasbourg -RCP25},
     note = {talk:3},
     publisher = {Institut de Recherche Math\'ematique Avanc\'ee - Universit\'e Louis Pasteur},
     volume = {17},
     year = {1973},
     language = {en},
     url = {http://www.numdam.org/item/RCP25_1973__17__A3_0/}
}
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Wehrl, A. How Chaotic is a State of a Quantum System ?. Les rencontres physiciens-mathématiciens de Strasbourg -RCP25, Tome 17 (1973), Exposé no. 3, 24 p. http://www.numdam.org/item/RCP25_1973__17__A3_0/

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