@article{10_4153_CMB_1986_021_9,
     author = {Feigelstock, S. and Raphael, R.},
     title = {A {Problem} on {Relative} {Projectivity} for {Abelian} {Groups}},
     journal = {Canadian mathematical bulletin},
     pages = {114--122},
     year = {1986},
     volume = {29},
     number = {1},
     doi = {10.4153/CMB-1986-021-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1986-021-9/}
}