@article{10_4153_CJM_1981_073_6,
     author = {Colebunders, Eva Lowen-},
     title = {Open and {Proper} {Maps} {Characterized} by {Continuous} {Setvalued} {Maps}},
     journal = {Canadian journal of mathematics},
     pages = {929--936},
     year = {1981},
     volume = {33},
     number = {4},
     doi = {10.4153/CJM-1981-073-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1981-073-6/}
}