@article{KYB_1989__25_2_a3,
     author = {Mare\v{s}, Milan},
     title = {Addition of fuzzy quantities: {Disjunction-conjunction} approach},
     journal = {Kybernetika},
     pages = {104--116},
     publisher = {mathdoc},
     volume = {25},
     number = {2},
     year = {1989},
     mrnumber = {995953},
     zbl = {0679.90027},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1989__25_2_a3/}
}