@article{10_4153_CJM_1992_028_0,
     author = {Zeidan, Vera},
     title = {Local {Minimality} of a {Lipschitz} {Extremal}},
     journal = {Canadian journal of mathematics},
     pages = {436--448},
     year = {1992},
     volume = {44},
     number = {2},
     doi = {10.4153/CJM-1992-028-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1992-028-0/}
}