@article{10_4153_CJM_1969_134_5,
     author = {Kaplansky, Irving and Shaker, Richard J.},
     title = {Abstract {Quadratic} {Forms}},
     journal = {Canadian journal of mathematics},
     pages = {1218--1233},
     year = {1969},
     volume = {21},
     number = {1},
     doi = {10.4153/CJM-1969-134-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1969-134-5/}
}