@article{KYB_2007_43_2_a2,
     author = {Drewniak, J\'ozef and P\c{e}kala, Barbara},
     title = {Properties of fuzzy relations powers},
     journal = {Kybernetika},
     pages = {133--142},
     year = {2007},
     volume = {43},
     number = {2},
     mrnumber = {2343391},
     zbl = {1135.03022},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_2007_43_2_a2/}
}