@article{KYB_1973_9_3_a3,
     author = {H\'ajek, Petr},
     title = {Automatic listing of important observational statements. {I}},
     journal = {Kybernetika},
     pages = {187--205},
     year = {1973},
     volume = {9},
     number = {3},
     mrnumber = {0401460},
     zbl = {0289.68046},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1973_9_3_a3/}
}