@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},
     pages = {1--24},
     publisher = {Institut de Recherche Math\'ematique Avanc\'ee - Universit\'e Louis Pasteur},
     volume = {17},
     year = {1973},
     language = {en},
     url = {http://archive.numdam.org/item/RCP25_1973__17__A3_0/}
}