@article{CMUC_1976__17_3_a6,
     author = {Gardner, Barry J. and Jackett, David R.},
     title = {Rings on certain classes of torsion-free {Abelian} groups},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {493--506},
     publisher = {mathdoc},
     volume = {17},
     number = {3},
     year = {1976},
     mrnumber = {0457590},
     zbl = {0363.20045},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1976__17_3_a6/}
}