@article{IM_1978__44_142527,
     author = {Yieh-Hei Wan},
     title = {Accessibility of {Local} {Pareto} {Optima} with {Constraints.}},
     journal = {Inventiones mathematicae},
     pages = {189--200},
     publisher = {mathdoc},
     volume = {44},
     year = {1978},
     zbl = {0409.58012},
     url = {http://geodesic.mathdoc.fr/item/IM_1978__44_142527/}
}