@article{KYB_1983__19_6_a7,
     author = {Ram{\'\i}k, Jaroslav},
     title = {Extension principle and fuzzy-mathematical programming},
     journal = {Kybernetika},
     pages = {516--525},
     publisher = {mathdoc},
     volume = {19},
     number = {6},
     year = {1983},
     mrnumber = {734836},
     zbl = {0528.90059},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1983__19_6_a7/}
}