@article{AUCMP_1981_22_1_a3,
     author = {Drbohlav, K.},
     title = {Remarks on tolerance algebras},
     journal = {Acta Universitatis Carolinae. Mathematica et Physica},
     pages = {11--16},
     year = {1981},
     volume = {22},
     number = {1},
     mrnumber = {0635972},
     zbl = {0478.08004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUCMP_1981_22_1_a3/}
}