@article{10_4153_CMB_1990_016_0,
     author = {Okoh, F. and Zorzitto, F.},
     title = {Extensions that are {Submodules} of their {Quotients}},
     journal = {Canadian mathematical bulletin},
     pages = {93--99},
     year = {1990},
     volume = {33},
     number = {1},
     doi = {10.4153/CMB-1990-016-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1990-016-0/}
}