@article{10_4153_CMB_1992_041_4,
     author = {Berger, Ruth I.},
     title = {The {Kernel} of and the {4-Rank} of {K2(O)}},
     journal = {Canadian mathematical bulletin},
     pages = {295--302},
     year = {1992},
     volume = {35},
     number = {3},
     doi = {10.4153/CMB-1992-041-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1992-041-4/}
}