@article{KYB_1984__20_6_a3,
     author = {Chien, Tran Quoc},
     title = {Duality in vector optimization. {III.} {Vector} partially quasiconcave programming and vector fractional programming},
     journal = {Kybernetika},
     pages = {458--472},
     publisher = {mathdoc},
     volume = {20},
     number = {6},
     year = {1984},
     mrnumber = {777980},
     zbl = {0575.49007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1984__20_6_a3/}
}