@article{10_4153_CMB_1973_012_9,
     author = {Friedler, Louis},
     title = {Open, {Connected} {Functions}},
     journal = {Canadian mathematical bulletin},
     pages = {57--60},
     year = {1973},
     volume = {16},
     number = {1},
     doi = {10.4153/CMB-1973-012-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1973-012-9/}
}