@article{MS2_1959__7_165723,
     author = {Bjarni Jonsson},
     title = {On {Direct} {Decomposition} of {Torsion} {Free} {Abelian} {Groups.}},
     journal = {Mathematica Scandinavica},
     pages = {361--371},
     publisher = {mathdoc},
     volume = {7},
     year = {1959},
     zbl = {0104.24505},
     url = {http://geodesic.mathdoc.fr/item/MS2_1959__7_165723/}
}