@article{10_4153_CJM_1968_070_3,
     author = {Hallam, T. G. and Komkov, V.},
     title = {Stability of {Solutions} of {Ordinary} {Differential} {Equations} with {Respect} to a {Closed} {Set}},
     journal = {Canadian journal of mathematics},
     pages = {720--726},
     year = {1968},
     volume = {20},
     number = {1},
     doi = {10.4153/CJM-1968-070-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1968-070-3/}
}