@article{SMJ2_2008_34_3_a5,
     author = {Ginchev, Ivan and Ivanov, Vsevolod I.},
     title = {First-Order {Conditions} for {Optimization} {Problems} with {Quasiconvex} {Inequality} {Constraints}},
     journal = {Serdica Mathematical Journal},
     pages = {607--618},
     publisher = {mathdoc},
     volume = {34},
     number = {3},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SMJ2_2008_34_3_a5/}
}