@article{CMUC_1980__21_1_a13,
     author = {Kat\v{e}tov, Miroslav},
     title = {Extensions of the {Shannon} entropy to semimetrized measure spaces},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {171--192},
     publisher = {mathdoc},
     volume = {21},
     number = {1},
     year = {1980},
     mrnumber = {566249},
     zbl = {0445.94007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1980__21_1_a13/}
}