@article{10_4153_CMB_1968_068_7,
     author = {Isbell, John R.},
     title = {A {Note} on {Exact} {Colimits}},
     journal = {Canadian mathematical bulletin},
     pages = {569--572},
     year = {1968},
     volume = {11},
     number = {4},
     doi = {10.4153/CMB-1968-068-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1968-068-7/}
}