@article{KYB_1980_16_3_a1,
     author = {\v{S}indel\'a\v{r}, Jan},
     title = {Statistical theory of logical derivability},
     journal = {Kybernetika},
     pages = {225--239},
     year = {1980},
     volume = {16},
     number = {3},
     mrnumber = {587570},
     zbl = {0444.03008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1980_16_3_a1/}
}