@article{10_4153_CMB_1973_062_0,
     author = {Small, Charles},
     title = {On {Certain} {Quotients} of {Grothendieck} {Groups}},
     journal = {Canadian mathematical bulletin},
     pages = {397--400},
     year = {1973},
     volume = {16},
     number = {3},
     doi = {10.4153/CMB-1973-062-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1973-062-0/}
}